The Bentley 4 Litre is a luxury car produced by Bentley Motors Limited from 1931 to 1933. It was designed to be a successor to the Bentley 4.5 Litre and was aimed at customers who wanted a more refined and comfortable car than the sportier 4.5 Litre.

The car was powered by a six-cylinder, 4.4-liter engine that produced approximately 120 horsepower. It was also equipped with a four-speed manual transmission and four-wheel brakes, which were an improvement over the rear-wheel brakes used on the Bentley 4.5 Litre.

The Bentley 4 Litre was available in several body styles, including saloon, tourer, and sports models. It featured a longer wheelbase than the Bentley 4.5 Litre, which provided greater interior space and improved ride comfort. The car was also more aerodynamic, with a lower hoodline and sloping radiator grille.

The Bentley 4 Litre was well-received by customers and was a commercial success for Bentley Motors Limited. It was also successful in motorsports, with notable wins at the 24 Hours of Le Mans in 1931 and 1932.