The Dobrynin VD-4K was a Soviet six-bank, 24-cylinder, turbo-compound, inline radial engine developed after the end of World War II.

Like Nazi Germany's experimental Junkers Jumo 222 multibank wartime engine, the VD-4K had six monobloc banks, each with four liquid-cooled cylinders.

The VD-4K utilized a trio of blow-down exhaust, also known as power-recovery, turbines were fitted between the cylinder banks, which made it a turbo-compound engine.

A geared centrifugal supercharger and a turbocharger were also fitted to the engine itself.

It was evaluated aboard a Tupolev Tu-4 bomber in 1950, itself powered with a quartet of the Shvetsov OKB's 1946-origin, ASh-73 radial engines, each of a displacement figure of 58.1 litres, somewhat close to that of the Dobrynin multibank powerplant design.