The Hupmobile Rumble Seat Coupé is a rear wheel drive road car, with the powerplant mounted in the front, and a 2 door coupé body.
It is part of Hupmobile's Series 521 series.
Its engine is a naturally aspirated petrol, 4 litre, side valve 6 cylinder with 2 valves per cylinder. In this application it develops 101 bhp (102 PS/75 kW) of power at 3600 rpm.
A 3 speed manual 'box supplies the power to the wheels.
Full specs