The Hanomag 2/10 PS was an economy car manufactured by Hanomag from 1924 to 1928. It was one of the first cars with envelope styling.
With a fuel consumption of 4.0 litres per 100 kilometres (71 mpg-imp; 59 mpg-US), the 2/10 PS was the world's most fuel efficient mass-production car between the two World Wars. The reason for that was, that it was the only mass-produced car of that time with a low-friction one-cylinder-engine and because of its light weight.
The 2/10 PS (two taxable / ten brake horsepower) had a single-cylinder 500 cc engine at the rear. The rear axle was chain-driven and had no differential.
The fenders, or wings, of the 2/10 PS were integrated into the bodywork of the car, allowing the passenger space to be wider than it would have been with the traditional separate fenders and running board. The compact drivetrain allowed the floor to be lower, making it possible to enter the car from the ground without a running board. The rounded appearance of the 2/10 PS, due to the envelope styling, caused the German people to nickname the car Kommissbrot after inexpensive, flat-sided loaves of bread used by the military.
The 2 /10 PS faced competition from the Opel Laubfrosch and the Dixi DA1 variant of the Austin 7 and was replaced in 1928 by the more conventional 3/16 PS model.