As against an inlet manifold engine of the same power, the turbo engine requires a smaller installation space and as such has a better power-weightratio.
Thee A29 Clan was to be propelled by a Rolls-Royce Meteor engine, up-rated to 700 bhp, which would give the Clan a top speed of 30 mph (48.3 kph) and power to weightratio of 13.82 hp/tons.