The Alvis Speed Twenty SB is a rear wheel drive motor car, with the engine positioned in the front, and a convertible/cabriolet body.
The Alvis Speed Twenty SB's engine is a naturally aspirated petrol, 2.5 litre, overhead valve 6 cylinder with 2 valves per cylinder. This powerplant has an output of 87 bhp (88 PS/65 kW) of power at 4000 rpm.
Stated kerb weight is 1372 kg.
Maximum speed quoted is 143 km/h (89 mph).
Full specs