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. It was affectionately referred to as the "Kommissbrot" or "Loaf of Rye Bread" due to its small squarish shape.
Drivetrain and radiator of a 2/10 PS
The 2/10 PS (two taxable / ten brake horsepower) had a single-cylinder half litre engine at the rear. The rear axle was chain-driven, with no differential. With a fuel consumption of 4.0 litres per 100 kilometres (71 mpg‑imp; 59 mpg‑US) it was the world's most fuel efficient mass-production car between the two World Wars due to the low-friction one-cylinder engine and its very light weight.
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, earned it the nickname Kommissbrot after the inexpensive, flat-sided bread used by the military.