The Stephens Salient Six 84's engine is a naturally aspirated petrol, 3.7 litre, overhead valve 6 cylinder with 2 valves per cylinder. This powerplant has an output of 57 bhp (58 PS/43 kW) of power at 2600 rpm.
The engine powers the wheels by means of a 3 speed manual set of gears.
The claimed kerb weight is 1406 kg.
Full specs