The Stoewer R 140 is a car of the lower middle class, which was made by Stoewer between 1932 and 1935, as successor of the V 5. Like its predecessor, the car had front-wheel drive and independent suspension on transverse leaf-springs.

The car had a 4-cylinder SV front-mounted in-line engine with a displacement of 1.4 litres, which developed 30 hp. The car was fitted with a 4-speed manual gearbox. The front wheels were attached to two transverse leaf springs, the rear wheels were attached with a transverse leaf spring. The body was taken from the previous model as well as the wheelbase and engine compartment. The engine compartment was later extended to accommodate the in-line engine. On the roadster, the wheelbase remained the same. By 1933, 1100 cars had been produced.

In 1933, the car was upgraded to house a 1.5-litre engine with the same power output. This was available as a two-door and a four-door sedan with hinged doors with no B-pillar. By the end of 1934, 1210 cars were made.

In 1934, the car was given an engine of the same displacement but the power output was increased to 35 hp. This car was named the Stoewer R 150, 1150 cars were made.

In 1935, the car was completely revised. The body was slightly longer and housed an engine with a capacity of 1.8 litres with an output of 45 hp. This was named the Stoewer R 180. Production ended that same year after only 300 cars were produced.