The ZMZ-24 was an aluminium-block overhead valve (OHV) inline four design, an evolution of the ZMZ-21A, displacing 2,445 cc, and in its initial appearance, produced with chain-driven camshaft and compression ratio of 6.6:1; it produced 70 hp at 4,000 rpm and 123 lbft at 2,200 rpm.[1] It was also produced as the UMZ 4178.10.[2]
It "quickly became the mainstay of the Soviet engine industry",[3] and would be used in a variety of vehicles.
The improved ZMZ-24D, found in the GAZ-24, ran on 92 RON gasoline (while the ZMZ-24-01 could use commonly available 76 octane, and the ZMZ-24-07 could use liquid propane).[4] 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 95 hp at 4500 rpm and an even more impressive 186 N.m 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.[3] In this format, it was used in the RAF minibus and ErAZ van.[5]
It also served as the basis for the sixteen-valve 131 hp 2,287 cc ZMZ-4062.10 (seen in some Volgas after 1996), the 145 hp 2,463 cc ZMZ-40552.10 (used in GAZ's commercial vehicles), the 2,690 cc ZMZ-409.10 of the UAZ Patriot, and the ZMZ-5143 diesel all derive from the ZMZ-24.[2]
Sources
- Thompson, Andy. Cars of the Soviet Union. Somerset, UK: Haynes Publishing, 2008.