| ZMZ-24 Engine | |
|---|---|
 Gaz-24 Volga engine in a [[1]] | |
| Overview | |
| Manufacturer | |
| Also called |
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| Production | 1968-1987 |
| Layout | |
| Configuration | Straight-4 |
| Displacement |
|
| Cylinder bore | |
| Piston stroke |
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| Cylinder block material | Aluminum |
| Cylinder head material | Aluminum |
| Valvetrain | |
| Compression ratio | 10.0:1, 10.2:1, 10.5:1 |
| Combustion | |
| Turbocharger | no turbocharger |
| Fuel system | Sequential MPFI |
| Fuel type | Gasoline |
| Oil system | Wet sump |
| Cooling system | Water-cooled |
| Output | |
| Power output | 70–95 hp (52–71 kW) |
| Torque output | 186 lb⋅ft (252 N⋅m) |
The ZMZ-24 was an aluminium-block overhead valve (OHV) inline four design, an evolution of the ZMZ-21A, displacing 2,445 cc (149.2 cu in), and in its initial appearance, produced with chain-driven camshaft and compression ratio of 6.6:1; it produced 70 hp (52 kW; 71 PS) at 4,000 rpm and 123 lb⋅ft (167 N⋅m) 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 (71 kW; 96 PS) at 4500 rpm and an even more impressive 186 N⋅m (137 ft⋅lbf) 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 (98 kW; 133 PS) 2,287 cc (139.6 cu in) ZMZ-4062.10 (seen in some Volgas after 1996), the 145 hp (108 kW; 147 PS) 2,463 cc (150.3 cu in) ZMZ-40552.10 (used in GAZ's commercial vehicles), the 2,690 cc (164 cu in) ZMZ-409.10 of the UAZ Patriot, and the ZMZ-5143 diesel all derive from the ZMZ-24.[2]