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[ZagatoOlaf]

Dear Alfa Romeo (1750 / 2000 GTAm) Aficionado's,

Sorry to have been away for a long time.
I made a new account because I can't access Zagato_Olaf anymore.

Having gathered a lot of data in the last couple of years, I thought it was time for a new listing.
I hope it will be helpfull and interesting to those who are into Alfa Romeo in general and into the 1750 / 2000 GTAm specifically.

This is the most recent chassisnumber listing and explanation on this great and interesting Alfa Romeo race car form the early 1970's.

Please understand that the post contains only part of the known info, there simply isn't enough room to add all data.
Thank you for all the fellow Alfa Romeo Aficionado's that contributed to this info!
This list wouldn't be possible without their contributions.

This is a long read.
I made paragraphs to cluster specific info about the type 1750 / 2000 GTAm.
Chassisnumbers are near the end of post. Please find below:
1. Definition.
2. Variants
3. Options
4. Development
5. Chassisnumbers
6. Sources

To understand the what and why of the GTAm, read the rest of this post. Have fun.

1. Definition.

As already said the 1750 / 2000 GTAm was an Alfa Romeo 1750 GTV USA (105.51) that had Spica fuelinjection. It had two brake boosters and standing pedals. These cars were in period converted by Autodelta to GTAm specification for racing. The homologation papers specify what changes could be made. Autodelta had a complete list of options to convert the car into a GTAm. Some 40 cars were converted to racing cars.
Along with the type 1750 GTV USA (105.51) some type 1750 GTV EU (105.44) have also been converted (standing and hanging pedals).

Difficulty with the GTAm is, that it never had a unique type- and chassisnumber. This is unlike the type GTA (105.32 LHD and 105.34 RHD) and type GTA 1300 Junior (105.59).

2. Variants.

There are variants within the different types:

• new cars from the production line converted to GTAm spec's by Autodelta SpA as Autodelta works cars
• new cars from the production line converted to GTAm spec's by Autodelta SpA as Autodelta customer cars
• existing cars converted to GTAm spec's by Autodelta SpA as Autodelta customer cars
• new or existing cars converted to GTAm spec's by other tuners/teams with parts from a specific tuner or a combination of Autodelta, Angelini, Balduzzi, Facetti and other parts like the Balduzzi cars (Tony Adriaensens mentions this in his book)
• new or existing (replacement) bodyshells with or without a chassisnumber that were equipped with Autodelta, Angelini, Balduzzi and other parts (for example from wrecked cars)
• other variants on this theme in various stages of tune within the rules and specifications of the homologation of the 1750 GTAm.

Edited: All this "in period" (1969 untill and including 1973).

3. Options.

There is a list of Autodelta factory options for your 1750/2000 GTAm called "GTAm modifications & options". Source of this info is the 1st edition of 'Alleggerita' by Tony Adriaensens. These options (and more) are also mentioned in the editions (III and IV) of the "Performance Options Catalog".
In the 2nd edition of 'Alleggerita' by Adriaensens, Dasse & Übelher, you will find a list and photographs of the parts that are specific to the GTAm (als well as to the Giulia Sprint GTA, GTA-SA and GTA 1300 Junior). This 2nd edition is a must for any GTA, GTA 1300 Junior, GTA-SA and 1750/2000 GTAm fan!

The options according to the 1st edition of 'Alleggerita' which are also found in the "Performance Options Catalog" (nr. IV or Rev 2/77):

• Aluminium or plastic doors, hood/bonnet and boot/rear deck lid
• Plastic dashboard
• Plexiglass door glass descending window or sliding window
• Lightweight laminated Glaverbel windshield and rear window
• Rear window also available in Plexiglass
• Lightweight battery in trunk (Warley)
• Anatomic racing seat Tipo 33, total weight 3 kg/6.6 lbs
• Roll over bar / protection cage
• Leather rimmed racing (steering) wheel
• FIA/Autodelta oil catch tank (1 litre)
• Special rear axle locating system with a sliding block (Slittone)
• Fully modified differential housing including Pivot Pin and reinforcements
• Steel torque Tee optional Unibal joints
• Modified arms for rear stabiliser bar
• Koni 220/85 shock absorbers
• Modified front suspension
• 26 mm front stabiliser bar
• 18 mm rear stabiliser bar
• Special close ratio gearboxes, on demand a Colotti T 118 gearbox
• ZF Autolock differential
• Lightweight bell housing, gears and gear lever
• Special lightweight racing or heavy duty rallye assembly clutch
• Sebring front exhaust pipe
• 60, 80 and 90 litre fuel tank with racing cab
• Special Autodelta patented 100 litre safety fuel tank
• Reinforcements and strap for oversize tank
• Dual Bendix fuel pumps + Lucas main fuel pump
• Special plumbing for dual fuel pumps
• Serck oil cooler
• Electron alloy deep sump and protection shields
• Modified oil pumps with, if necessary longer pickups for deep pan bottoms
• Elaborated crankcase
• Monosleeves
• Special racing camshafts
• Special racing pistons flat
• Lightweight flywheel
• Racing crankshafts
• Special steel racing (connecting) rods; 0,740 kg/ 1.631 lbs
• Special small cylinderhead valve angle 45 degrees with double ingnition (Testa Stretta)
• Guillotine throttle assembly for use with Spica or Lucas Mk II
• Fiberglass or aluminium air box assembly with integral horns & nozzle holders
• Spica or Lucas (mechanical fuel) injection
• 10.000 rpm Motorola-Jones rev counter
• Dinoplex electric ignition
• Ventilated ATE front and rear discs with aluminium calipers
• 13 inch Campagnolo magnesium wheels (from 7Lx13 to 10Lx13) also 7Lx15 was available
• Plastic front and rear fender flares to use with 13inch wheels

On special demand:

• 16 valve, single ignition cylinder testa stretta heads approx. 240 hp with 16V exhaust manifold
• T64 braking torque differential

I doubt whether this list is fully complete.
What about for example:

• Special Autodelta works engines upgraded to 84.6 x 88.5 giving 1990cc

And what about for example other tuners such as Angelini with it's 2000cc 16 valve cylinderhead with Weber carburettors.
Further specifications can be found in the homologation papers.

4. Developments.

A lot of GTAm's will have been rebuilt and updated during and after their racing life, engines and gearboxes were swapped, extra weight taken off for example hillclimbing, they have been restored, etc ..... And some of these cars had great palmares while others were less fortunate.

Genuine cars and copies:
Besides that, there are a lot of copies and "tribute" cars with various stages of tune and less or more original GTAm parts. Have a look around on alfabb and you will see a lot of GTV's being changed into GTAm copies. Some of them are very nice and well built.

5. Chassisnumbers.

Here is a list with with chassisnumbers and the sources of the information we have collected sofar. This list is an updated and extended version of the earlier lists published in this thread. Sources for this list are:

• Maurizio Tabucchi (MT) in his book 'Alfa Romeo GTA'
• Tony Adriaensens in his 1st edition of the book 'Alleggerita'
• Tony Adriaensens, Patrick Dasse & Martin Übelher (A,D&Ü) in their 2nd edition of the book 'Alleggerita'
• research by members of this forum
• my own research.

There is a so called 'bad scan', that was a fax/list of chassisnumbers with errors, that caused misunderstandings concerning the chassisnumbers.
You wil see the typos from this fax/list mentioned amongst the chassisnumbers.
This is the latest updated list from the 5th of May 2023:

Chassisnumbers from the European 1750 GTV conversion (105.44) to GTAm.

# 1351404 Questionmark. White car for sale in 2023.

# 1357840 Copy. Monzeglio Squadra Corse, round front indicator lights, CT licenseplate, copy of the real car accoording too the sellers of this vehicle.

# 1358476 GTAm Autodelta Elaborazione 1968, Autodelta works engine (source: MT), history mentioned by A,D&Ü, licenseplates BL 54224 / TV 191114 / PN 48500 / TV 313588

# 1357933 Questionmark (source: Martin Übelher)

# 1363100 GTAm History mentioned by A,D&Ü

# 1378479 GTAm Monzeglio Squadra Corse 1970 (source: MT), Martin Übelher confirms this car as genuine in post #40, history mentioned by A,D&Ü, this car has the square indicator lights in the front instead of the small round indicator lights, licenseplate TO E38632

# 1382607 GTAm Autodelta SpA prepared, history mentioned by A,D&Ü.
(source: Fred della Noce), Fred noted that he used to own a Brasilian ex Jolly Club Hotel GTAm now owned by Alcidis Diniz in Brasil.

Chassisnumbers from the US 1750 GTV conversion to GTAm (105.51)

# 1530037 Questionmark. Source: Eiso Bergsma, he claims that the original Autodelta invoice is with the car, others claim that this invoice belongs to another GTAm, prepared in 1974, Balduzzi camcover, history mentioned by A,D&Ü.

# 1530038 No GTAm (source: Don Best) Typo for 1530938 according to Martinues 'bad scan', Don Best confirmed it is a typo because he was working from the 'bad' scan.

# 1530145 No GTAm (source: Don Best) Typo for 1532345, according to Martinues 'bad scan'.

# 1530246 No GTAm (source: Don Best) Typo for 1532346, according to Martinues 'bad scan'. It turns out that 0246 is a roadgoing 1750 gtv so that definitely confirms that there were typos in the "bad scan" in the chassisnumbers. See post #397

# 1530537 Questionmark (source: RossoGTVforme, Autodelta prepared (works car?). No date (Sent to US), seen in Monterey. More info?

#1530671 GTAm Autodelta SpA, 01-09-1969, history mentioned by A,D&Ü, licenseplates Prova MI 1370/F-DE 65/MI K97829

# 1530776 GTAm Autodelta SpA, 29-10-1969, history mentioned by A,D&Ü, licenseplate MI L18548

# 1530782 GTAm Jolly Club, 31-12-1969 Takis confirms car now in the Alfa Romeo Museo Storico collection, see post #34, history mentioned by A,D&Ü, licenseplate MI L12787

# 1530787 No GTAm (source: Don Best) Typo for 1530782 according to Martinues 'bad scan', Don Best confirmed it is a typo because he was working from the 'bad' scan.

# 1530834 GTAm Autodelta SpA works car No date (source: Adriaensens) Imported by Alfa Romeo Benelux, history mentioned by A,D&Ü. Colour of the car was Blue (medio), now white. The car has been restored in the USA.

#1530838 GTAm Autodelta SpA to Alfa Romeo Vertriebs GmbH Frankfurt am Main. Raced by Hahn, history mentioned by A,D&Ü, licenseplates MA GS-555/MA TB-555.

# 1530840 GTAm Raced by Alfa Romeo Benelux/Grafo Racing Team No date (source: Adriaensens), chassis mentioned by A,D&Ü.
Present colour of the car is white with dark blue, enginebay is matt black. Car is in Belgium.

# 1530841 GTAm Autodelta SpA. Raced by Hahn No date (source: Adriaensens), history mentioned by A,D&Ü, licenseplate MA HE-555. Present colour of the car is red, enginebay is matt black. Car is in the Netherlands.

# 1530843 GTAm Chassis mentioned by A,D&Ü

# 1530848 GTAm Alfa Romeo 27-01-1970 previously owned and raced by Toine Hezemans No date (source: Adriaensens), chassis mentioned by A,D&Ü, licenseplate 63-42-MN and 93-42-MN. Present colour of the car is red, enginebay is matt black. Car is in the Netherlands.

# 1530849 GTAm Autodelta SpA 27-01-1970, history mentioned by A,D&Ü, licenseplates MI K92422/HGN-19K ,

# 1530879 GTAm Autodelta SpA 08-01-1970, history mentioned by A,D&Ü, licenseplate MI K63991

# 1530896 GTAm Autodelta SpA 28-01-1970, history mentioned by A,D&Ü,

# 1530938 GTAm Autodelta SpA 26-01-1970, history mentioned by A,D&Ü,
could be ex-Chiapparini and ex-Rosso Bianco collection, is now in private collection and for sale as of december 2010, licenseplate MI K91850

# 1530952 GTAm Autodelta SpA 26-01-1970 (source: MT) Autodelta works car No date (source: Adriaensens), history mentioned by A,D&Ü, licenseplate MI L27247

# 1530974 GTAm Alfa Romeo (source: Bjorn Schmidt), history mentioned by A,D&Ü.

# 1531034 GTAm Autodelta SpA 11-02-1970 (source: MT), history mentioned by A,D&Ü, licenseplate MI L26447

# 1531039 GTAm Autodelta SpA 11-02-1970 (source: MT) Ex SOFAR France driven by Chasseuil (source: Adriaensens), history mentioned by A,D&Ü

# 1531042 GTAm Autodelta SpA 16-02-1970 (source: MT) Autodelta works car No date (source: Adriaensens), history mentioned by A,D&Ü, licenseplate MI L26448

# 1531068 GTAm Alfa Romeo 24-02-1970 Car was bought at the end of 1970 and needed a rebuild when it arrived in Australia (source: Vince Sharp), history mentioned by A,D&Ü, have a look at GTAm revealed at AROCA Spettacolo 2013

# 1531210 GTAm Raced by Alfa Romeo Benelux No date (source: Adriaensens), history mentioned by A,D&Ü

# 1531212 GTAm Alfa Romeo SpA, history mentioned by A,D&Ü, licenseplate MI L47391

# 1531222 GTAm Alfa Romeo SpA 20-02-1970 (source: MT) see post #192, history mentioned by A,D&Ü, licenseplates MI L47392/ SI 124926

# 1531230 GTAm Autodelta SpA, 30-05-1970 (source: Adriaensens), history mentioned by A,D&Ü, licenseplate MI L47393

# 1531231 GTAm Luigi Cecchini 26-05-1970 (source: MT), Takis confirms car is now in Greece, see post #35, Autodelta works engine* No date (source: Adriaensens), history mentioned by A,D&Ü, licenseplate MI L29550

#1532022 GTAm Alfa Romeo 01-10-1970, sold 22-02-1971 in Madrid, Spain, body colour is white with black interior, chassis mentioned by A,D&Ü, licenseplate MI M48973

#1532028 GTAm Alfa Romeo Deutschland, history mentioned by A,D&Ü

#1532099 Questionmark Alfa Romeo 14-01-1971 (source: Matteo Tstsis/fb 2023). Car sold on the 10th of May 1971 to Motor Hellas, Athens, Greece? Tuned by Autodelta or built up locally by Motor Hellas?

# 1532165 No GTAm (source: Don Best) Typo for 1532166 according to Martinue's 'bad scan', Don Best confirmed it is a typo because he was working from the 'bad' scan.

# 1532166 GTAm Alfa Romeo Destination USA (source: MT) Autodelta prepared for Scuderia Brescia Corse No date (source: Adriaensens), history mentioned by A,D&Ü, licenseplates MI L27427/MI L31853/MI M54088/PR193113/MN 192542

# 1532265 GTAm Autodelta SpA 23-01-1971 (source: MT), Escuderia Nacional, history mentioned by A,D&Ü, licenseplate MI M48973

# 1532307 GTAm Autodelta SpA 23-01-1971 (source: MT), history mentioned by A,D&Ü

# 1532327 GTAm Autodelta SpA 23-01-1971 (source: MT), chassis mentioned by A,D&Ü

# 1532345 GTAm Alfa Romeo 17-05-1971, (source: MT in post #112: thread concerning 'GTAm prices' mentioning the 'Angola' GTAm's), chassis mentioned by A,D&Ü, licenseplate AAD-XX-XX

# 1532346 GTAm Alfa Romeo 17-05-1971 (source: MT in post #112: thread concerning 'GTAm prices' mentioning the 'Angola' GTAm's), history mentioned by A,D&Ü, licenseplates AAD-XX-XX/ST-76-00

# 1533142 GTAm Autodelta SpA 28-01-1972 (source: MT) Autodelta works car No date (source: Adriaensens), history mentioned by A,D&Ü

# 1534912 Questionmark (source: Ecarrillo) Should this read 1354912 and was it a typo. Why then was chassis 1534912 mentioned in the auction data? What about the RHD?

# 1538476, No GTAm, this should read as 1358476 (source: Adriaensens)

Please remember that this list is not complete, where the history of the individual chassis is concerned. There simpy isn't enough room to add all that is known.
Please note that Adriaensens, Dasse & Übelher ("history mentioned by A, D & Ü") have added a lot of history to the individual chassisnumbers in the 2nd edition of "Alleggerita".
More is to come, because A, D & Ü did not add history that could not be verified. For example #1530840 and #1530841 are two of the chassisnumbers with a lot of info to be added.

Furthermore, Tom Tanner made a list of colours belonging to the different chassisnumbers.

Please feel free to comment on and add information to this list.

6. Sources.

• "Alleggerita" 1st edition by Tony Adriaensens
• "Alfa Romeo GTA" by Maurizio Tabucchi
• "Alleggerita" 2nd edition by Tony Adriaensens, Patrick Dasse & Martin Übelher
• "Performance Options Catalog" by Autodelta, nrs I to IV
• "Competition Reference Manual" by Don Black, revision of edition 2, January 10th 1999
• Research & information from fellow Alfa members and facebook members
• My own research

Please feel free to add and correct info, if you think that is relevant!
Ciao, Olaf 13th of May 2023.


Olaf Roeten a.k.a. Zagato_Olaf/ZagatoOlaf
Bussum, The Netherlands

Edited by ZagatoOlaf, 13 May 2023 - 17:22.