1965→1966 Fiat Abarth OT 1300

1965→1966 Fiat Abarth OT 1300

While the Ferrari GTO was heralded for winning the Division 3 World Touring Car Championship, the Fiat Abarth OT 1300 nearly matched its performance in Division 1. This small car won many important victories for Abarth including the 1966 and 1967 Division 1 World Championships.

Based on Simca parts, the OT 1300 used a heavily modified version of its chassis. Engineer Mario Colucci was responsible for the design which used a modified Simca 1000 floor pan. Attached to this were new front and rear sections that supported independent suspensions and modified Fiat 850 components.

The engine was designed from the ground up, but was similar to the Simca 1.3-liter they had raced in previous years. It was built at Corso Marche and by Luciano Fochi who had already designed the 1.6 and 2.0-liter units. Hallmarks of the engine included five main bearings, twin overhead cams and twin choke Weber carburetors.

1965→1966 Fiat Abarth OT 1300

The whole car was covered in a sleek fiber glass body that was penned Mario Colucci and fabricated at Sibona & Basano of Turin. Upfront was a large opening to feed air to a radiator which was then extracted out the top of the hood. Both the front and rear sections were hinged and provided ample access to the running gear.

Between May 1965 and March 1966, over 50 examples of the OT 1300s were made to satisfy homologation requirements. It replaced the Abarth Simca 1300 but raced in the prototype class until homologated in May of 1966. During the season, the OT 1300 racked up 37 points towards the Constructor’s Championship.

In 1967, the design was updated starting with the chassis which was widened. Probably the most distinctive touch was the addition of a roof-mounted scoop which fed the carburetors fresh air. At the rear were many changes including larger Plexiglas rear window and a very small spoiler.

1965→1966 Fiat Abarth OT 1300

At the 1967 Le Mans, the 1300 OTs were the very last cars to complete their race, but won their class in 16th place overall. They were behind similarly powered Alpine A210 Renaults that had to be placed in the prototype category due to homologation requirements.

Overall both the series I and series II OT 1300s were very successful. They won the 1966 and 1967 Division 1 Grand Touring World Championship and the 1966, 67 and 68 Group 4 Italian Championship.

1965→1966 Fiat Abarth OT 1300

Bibliography and Further Reading

Braden, Pat & Schmidt, Greg. Abarth Fiat Simca Porsche Street Race Record, Osprey, United Kingdom: 1983.
Cosentino, Alfred. Abarth Guide, Nigensha Publishing, Japan: 1984.
Greggio, Luciano. Abarth, the man, the machines, Giorgio Nada Editoire, Italy: 2002.


In Detail

submitted byRichard Owen
typeRacing Car
production years1965 – 1966
released at1965 Nürburgring 500kms
built atTurin, Italy
body stylistMario Colucci
coachbuilderSibona & Basano
engineAbarth Inline-4
positionRear, Longitudinal
valvetrainDOHC, 2 Valves per Cyl
fuel feed2 Twin-Choke Weber 45DCOE9
displacement1289 cc / 78.7 in³
bore86 mm / 3.39 in
stroke55.5 mm / 2.19 in
engine designerLuciano Fochi
power109.6 kw / 147 bhp @ 8800 rpm
specific output114.04 bhp per litre
bhp/weight224.43 bhp per tonne
body / frameBox Steel Chassis
driven wheelsRWD
front tires5.5×13
rear tires6.0×13
front brakesDiscs
rear brakesDiscs
steeringWorm & Sector
f suspensionTrailing Arms w/Coil Springs, Hydraulic Dampers, Anti-Roll Bar
r suspensionTrailing Arms w/Coil Springs, Hydraulic Dampers, Anti-Roll Bar
curb weight655 kg / 1444 lbs
wheelbase2015 mm / 79.3 in
front track1296 mm / 51.0 in
rear track1340 mm / 52.8 in
length3830 mm / 150.8 in
width1620 mm / 63.8 in
height1040 mm / 40.9 in
transmission5-Speed Manual
final drive5.4:1
top speed~245 kph / 152.2 mph
race victories1966 500 km Nürburgring, 1967 GP Hockenheim
class victories1966 1000 km Monza, 1966 1000 km Nürburgring, 1966 GP Mugello, 1966 Coppa Citta di Enna, 1966 GP Hockenheim, 1966 500 km Zeltweg, 1967 GP Mugello, 1967 Coppa Citta di Enna, 1967 500 km Zeltweg, 1967 Ollon-Villars Hillclimb, 1967 500 km Nürburgring