1963 Jaguar E-Type Lightweight Roadster

Not long after Sir William Lyons approved the E-Type for production, William Heyes, the project manager suggested building 10 to 12 lightweight competition cars for the 1959 season.

The Lightweight carried approximately 114kg (250lb) less weight than a standard E-type, thanks to its all-aluminium body and engine block, a lack of interior trim and exterior chrome work and a host of further weight-saving features including lightweight, hand-operated side windows.

Engine
Configuration XK Straight 6
Location Front, longitudinally mounted
Construction aluminium alloy block and head
Displacement 3,781 cc / 230.7 cu in
Bore / Stroke 92.1 mm (3.6 in) / 106.0 mm (4.2 in)
Valvetrain 2 valves / cylinder, DOHC
Fuel feed Lucas Fuel Injection
Aspiration Naturally Aspirated
Power 344 bhp / 257 kW @ 6,800 rpm
BHP/Liter91 bhp / liter
Drivetrain 
Body aluminium body panels
Chassis steel monocoque with front subframe
Front suspension wishbones, torsion bars, telescopic dampers, anti-roll bar
Rear suspension lower wishbones, upper driveshaft links, radius arms, double coil springs over dampers, anti-roll bar
Steering rack-and-pinion
Brakes (fr/r)discs
Gearbox ZF 5 speed Manual
Drive Rear wheel drive
Dimensions 
Weight 975 kilo / 2,150 lbs
Length / Width / Height 4,440 mm (174.8 in) / 1,650 mm (65 in) / 1,194 mm (47 in)
Wheelbase / Track (fr/r) 2,440 mm (96.1 in) / 1,270 mm (50 in) / 1,270 mm (50 in)
Performance figures 
Power to weight0.35 bhp / kg
Top Speed 274 km/h (170 mph)