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  Lotus 81 Cosworth
 

  Article Image gallery (49) Chassis (4) Specifications  
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Country of origin:Great Britain
Produced in:1980
Numbers built:4
Internal name:Type 81
Predecessor:Lotus 80 Cosworth
Author:Wouter Melissen
Last updated:May 11, 2020
Download: All images

Engine
Configuration Ford Cosworth DFV 90º V8
Location Mid, longitudinally mounted
Weight 168 kilo / 370.4 lbs
Construction aluminium block and head
Displacement 2,993 cc / 182.6 cu in
Bore / Stroke 85.7 mm (3.4 in) / 64.8 mm (2.6 in)
Compression 11.5:1
Valvetrain 4 valves / cylinder, DOHC
Fuel feed Lucas Fuel Injection
Lubrication Dry sump
Aspiration Naturally Aspirated
Power 485 bhp / 362 kW @ 10,750 rpm
Torque 353 Nm / 260 ft lbs @ 9,000 rpm
BHP/Liter 162 bhp / liter

Drivetrain
Body glass reinforced plastic and Kevlar body
Chassis aluminium monocoque with fully stressed engine
Front suspension double wishbones, coil springs over dampers, anti-roll bar
Rear suspension double wishbones, rocker operated coil springs over dampers, anti-roll bar
Steering rack-and-pinion
Brakes (fr/r) ventilated discs
Gearbox Hewland FGA 5 speed Manual
Drive Rear wheel drive

Dimensions
Weight 574 kilo / 1,266 lbs
Length / Width / Height 4,267 mm (168 in) / 2,070 mm (81.5 in) / 965 mm (38 in)
Wheelbase / Track (fr/r) 2,743 mm (108 in) / 1,702 mm (67 in) / 1,588 mm (62.5 in)
Fuel tank 175 Litre (46.2 Gallon US / 38.5 Gallon Imperial)
Wheels (fr/r) 11 x 13 / 18 x 13
Tyres Michelin

Performance figures
Power to weight 0.84 bhp / kg

Resources
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  Article Image gallery (49) Chassis (4) Specifications