  Michele Alboreto, 1985 winner of the Canadian and German Grands Prix |
 Model 156/85
Type Formula 1 racing car.
Years of activity 1985.
First race Brazilian Grand Prix of 7.4.1985.
Engine Type 031. 6 cylinders in 120° V, rear-mounted. Light alloy cylinder block and heads, press-fitted aluminium cylinder liners. Water cooled.
Bore and stroke 81 x 48.4 mm.
Unitary and total capacity 249.4 / 1,496.43 cc.
Compression ratio 7:1.
Max. power output In a race 780 bhp at 11,000 rpm. Max. pressure 3.6 bar.
Timing gear 4 valves per cylinder, 2 overhead cams per bank of cylinders. New gear drive at rear.
Fuel feed 2 KKK turbos positioned at side. Weber-Marelli digital electronic injection plus Emulsistem.
Ignition Single. Magneti Marelli electronic.
Lubrication Forced. Dry sump.
Transmission Rear. Multi-plate clutch. 635 gearbox with 5 speeds + reverse,. transverse incorporating the engine oil tank. ZF self-locking differential.
Gear ratios Variable depending on racing circuit.
Frame Type 635. New CAD-designed monococque. Honeycomb composite with carbon fibre and Kevlar.
Front suspension Double wishbones: double overlapping triangles, pull-rod spring control.
Rear suspension Double wishbones: upper trapezium, lower triangle, pull-rod spring control.
Steering Rack and pinion.
Brakes Carbon discs. Brembo 4-piston callipers on all four wheels.
Tyres Front 25.0-10.0-13î, rear 26.0-15.0-13î - Goodyear.
Rims ìSpeedlineî multi-piece. Front 12.5x13î, rear 16.5x13î.
Wheelbase 2,762 mm.
Front/rear track 1,797 mm / 1,663 mm.
Length 4,292 mm.
Width 2,135 mm.
Height 1,080 mm.
Weight with water and oil 548 kg.
Fuel tank (litres) 220. Mid-mounted. Fuel 102 octane RON.
Alternator/dynamo 40 A.
Battery 12 V, 10 Ah.
Bodywork Composite, only for side panelling of systems.
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