ZMZ-24

The ZMZ-24 was an aluminium-block overhead valve inline four design, an evolution of the ZMZ-21A, displacing, and in its initial appearance, produced with chain-driven camshaft and compression ratio of 6.6:1; it produced at 4,000 rpm and at 2,200 rpm. It was also produced as the UMZ 4178.10.
It "quickly became the mainstay of the Soviet engine industry", and would be used in a variety of vehicles.
The improved ZMZ-24D, found in the GAZ-24, ran on 92 RON gasoline. The cylinder block was die cast, instead of the slower coquille for the 21A. The engine featured a twin-choke carburettor, with a higher compression ratio, producing at 4500 rpm and an even more impressive of torque at 2200–2400 RPM.
By 1970, the ZMZ-24 had been renamed the ZMZ-402.10, with a lower-compression 4021.10 version, which remained in limited production until 2006. In this format, it was used in the RAF minibus and ErAZ van.
It also served as the basis for the sixteen-valve ZMZ-4062.10, the ZMZ-40552.10, the ZMZ-409.10 of the UAZ Patriot, and the ZMZ-5143 diesel all derive from the ZMZ-24.