Lancia Rally 037 Technical Information

The initial specification for the 037 was as follows:

Drive Train 2WD Rear
Gearbox ZF DS25/2 5 speed transaxle, full synchromesh (as used in Ford GT40, de Tomaso Panterra etc)
Gear Ratios 2.417/1.611/1.136/0.846/0.704 reverse 2.867
Final Drive 5.25:1
Engine 4 cylinder in-line, 16V, 2 OHC (as used on the FIAT Abarth 131 Mirafiori) Dry sump lubrication
Bore 84 mm
Stroke 90 mm
Capacity 1995 cc
Compression Ratio 7.5:1
Induction Roots type supercharger, single Weber 40DCN
Power (BHP) 205 @7000rpm
Torque 23.8 kgfm 170.17 ft lb @5000rpm
Wheels 8 x 16 front, 9 x 16 rear
Tyres Pirelli P7 205/55/16 front, 225/50/16 rear
Dimensions 3915 mm long, 1850 mm wide, 1245 mm high
Wheelbase 2440 mm
Track Front/Rear 1508 mm/1490 mm
Weight 1170 kg
Top Speed 137 mph
Acceleration (0-60 mph) 7 seconds

Further Refinements

1982 Gara version

There were some technical changes made to the cars for the Group B rally format. The 21 cars built in April 1982 had 260 bhp @7000 rpm and had a reduced weight of 1020 kg.

1982 Evolution 1

Further changes were made in August 1982 when 21 Group B Evolutione cars were built. The supercharger was replaced with a 3 port Roots type supercharger, and Bosch-Kugelfischer mechanical fuel injection was introduced from October 1982. Water injection (to reduce inlet temperatures and improve reliability) was also introduced. This increased the power to 305bhp @8000rpm and torque to 30 kgfm/215 ft lb @5000rpm. The final weight was 960 kg.

1984 Evolution 2

Yet more changes were introduced for 17 cars built between 1984 and 1986. The Group B Evolution 2 had the following engine configuration:

Bore 85mm
Stroke 93 mm
Capacity 2111 cc
Power 325 bhp @8000 rpm (0.9 bar boost)
Torque 32 kgfm (228 ft lb) @ 5000rpm

At some point the gearbox was fitted with straight cut close ratio gears with dog clutches - rather like a Hewland. A wide variety of gear ratios and final drive ratios were homologated, but the standard ratios were: 2.31/1.61/1.30/1.125/1.00 with either a 4.88 or 5.25 final drive.

1985 Evolution 2

Some of the 17 cars built between 1984 and 1986 had a new engine and even larger power output:

Bore 84mm
Stroke 90 mm
Capacity 1995 cc
Power 350 bhp @8000 rpm
Torque 30 kgfm (213 ft lb) @5000 rpm

Still weighing a mere 960 kg, these machines were very quick!

Wheels and tyres

A wide range of wheels and tyres were used for rallying. 16" diameter front wheel were always used, 3 piece for tarmac and one piece for tougher stages. At the rear, 18" diameter wheels were tried on the Evolution cars for some events, but mostly 16" diameter 3 piece and one piece wheels were used. Tyres were always Pirelli on the works cars, the P7 Corsa in various widths, patterns and compounds for tarmac use, and mainly SG35 off-road pattern tyres in 3 compounds and various widths for loose stages. I have also seen photographs of the competition cars on CN36 road pattern and MS35 'mud and slush' pattern tyres. On ice they used a narrow studded tyre known as a Hakka.