GAZ 24: which 2.5 MT to choose — 85 hp first generation or 100 hp second generation

The GAZ 24 in this catalogue is two Sedan generations and two versions, both named 2.5 MT. They are not the same car. First-generation 2.5 MT (85 hp, 1968–1987) is the lighter, slower, thirst-lighter city car. Second-generation 2.5 MT (100 hp, 1985–1992) is the stronger, heavier, faster car with a different front suspension.

GAZ 24: which 2.5 MT to choose — 85 hp first generation or 100 hp second generation

The GAZ 24 in this catalogue is two Sedan generations and two versions, both named 2.5 MT. They are not the same car. First-generation 2.5 MT (85 hp, 1968–1987) is the lighter, slower, thirst-lighter city car. Second-generation 2.5 MT (100 hp, 1985–1992) is the stronger, heavier, faster car with a different front suspension. There is no third engine, no extra gearbox, and no other body in the data. Searches for GAZ 24 Volga V8, GAZ 24-24, GAZ 2410, or GAZ 24-34 describe other cars; they are not among these versions.

Both 2.5 MT cars share the same 2445 displacement, Gasoline, 4 Inline cylinders, 2 valves per cylinder, No boost, Front, longitudinal layout, Carburetor, fuel 76, Manual 4, RWD, 55 tank, Drum front brakes, Drum rear brakes, and a Dependent, leaf spring rear. The buy decision is the 15 hp, 32 Nm, 120 kg, 2-second 0–100, 10 km/h top-speed, and 2-unit city-consumption gap — plus Independent, spring versus Dependent, spring at the front.

Generations: what actually changed between 1 generation and 2 generation

1 generation (1968–1987), Sedan, 1 version. One 2.5 MT: 85 hp (62 kW) at 4500 rpm, 150 Nm at 2400 rpm, compression 6.7, 0–100 in 20, top speed 135, kerb 1420, gross 1820. Front suspension is Dependent, spring. Mixed consumption is 11. This generation is the long-run car: 1968 through 1987.

2 generation (1985–1992), Sedan, 1 version. One 2.5 MT: 100 hp (73 kW) at 4500 rpm, 182 Nm at 2600 rpm, compression 8.2, 0–100 in 18, top speed 145, kerb 1540, gross not measured. Front suspension is Independent, spring. Mixed consumption is not measured. Production starts in 1985, so 1985–1987 overlap the first generation. Same name 2.5 MT — pick by 100 hp versus 85 hp.

Restyling is not a third generation. There are 2 generations, not more.

GAZ 24 engine specs: both versions named 2.5 MT

VersionGenerationhpkWNmDisplacementFuelCylindersLayoutBoostGearboxDrive
2.5 MT (85 hp)1 generation85621502445Gasoline4InlineNoManual 4RWD
2.5 MT (100 hp)2 generation100731822445Gasoline4InlineNoManual 4RWD

Same 2445, same 4 Inline, same No boost, same Carburetor, same 92 x 92 bore and stroke, same peak-power rpm 4500. Second-generation 2.5 MT raises compression from 6.7 to 8.2 (+1.5) and peak torque from 150 Nm at 2400 rpm to 182 Nm at 2600 rpm. Power per litre: 85 / 2.445 ≈ 34.8 hp per litre on first-generation 2.5 MT; 100 / 2.445 ≈ 40.9 hp per litre on second-generation 2.5 MT. That is +6.1 hp per litre on the same displacement. kW gap is 73 − 62 = 11 kW.

GAZ 24 horsepower in this file is only 85 or 100. There is no V8 figure here.

Performance, mpg, and what the extra 15 hp buys

First-generation 2.5 MT: 0–100 in 20, top speed 135, city 13, highway 10, mixed 11. Second-generation 2.5 MT: 0–100 in 18, top speed 145, city 15, highway 10, mixed not measured.

Arithmetic: −2 seconds to 100, +10 top speed, +2 city consumption, highway unchanged at 10. Mixed 11 exists only on first-generation 2.5 MT; treating the later car as “same mixed” is not supported.

Weight-to-power: 1420 / 85 ≈ 16.7 kg per hp (first-generation 2.5 MT) versus 1540 / 100 = 15.4 kg per hp (second-generation 2.5 MT). The later car is 120 kg heavier but still ~1.3 kg/hp lighter per horsepower. Power-to-weight: 85 / 1420 ≈ 0.060 hp/kg versus 100 / 1540 ≈ 0.065 hp/kg.

CO2 is not measured on either 2.5 MT. Eco class is not measured on either 2.5 MT.

If the question is mpg in town, first-generation 2.5 MT at city 13 beats second-generation 2.5 MT at city 15. If the question is highway mpg, both are 10. If the question is acceleration and top speed, second-generation 2.5 MT is the one that is 2 seconds and 10 km/h ahead.

GAZ 24 weight, dimensions, tank, clearance

Kerb: first-generation 2.5 MT 1420, second-generation 2.5 MT 1540 (+120). Gross: 1820 on first-generation 2.5 MT; not measured on second-generation 2.5 MT. Payload on the first car is 1820 − 1420 = 400. You cannot compute payload on the later 2.5 MT.

Tank 55 on both. Ground clearance not measured on both. Wheel sizes not measured on both. GAZ 24 dimensions beyond those masses and the tank are not in this data; do not invent length, width, or height.

Front axle: Dependent, spring on first-generation 2.5 MT; Independent, spring on second-generation 2.5 MT. Rear: Dependent, leaf spring on both. Brakes: Drum / Drum on both.

Which version to buy and why

There are only two catalogue choices, both 2.5 MT, distinguished by 85 hp and 100 hp.

Buy first-generation 2.5 MT (85 hp, 1968–1987) if you want the lower kerb 1420, the only measured gross 1820, the only measured mixed 11, city 13 instead of 15, and the full 1968–1987 span. You accept 85 hp, 150 Nm, compression 6.7, 0–100 in 20, top speed 135, Dependent, spring front, and 16.7 kg per hp. This is the lighter RWD Sedan in the pair.

Buy second-generation 2.5 MT (100 hp, 1985–1992) if you want 100 hp, 182 Nm, compression 8.2, 0–100 in 18, top speed 145, Independent, spring front, and 15.4 kg per hp. You accept kerb 1540, city 15, mixed not measured, gross not measured, and a shorter 1985–1992 window. Same 2445, same Manual 4, same RWD, same 55 tank, same highway 10, same Drum brakes.

What the extra 15 hp “buys” on the numbers: +32 Nm, +1.5 compression, −2 s to 100, +10 top speed, −1.3 kg/hp, +6.1 hp per litre, Independent, spring instead of Dependent, spring at the front. What it costs on the numbers: +120 kg, +2 city consumption, mixed and gross not measured.

Reliability is not a measured field in this data. Do not treat either 2.5 MT as proven more reliable. What is measured is mechanical sameness (2445, 4 Inline, Carburetor, Manual 4, RWD, fuel 76, No boost) and the listed deltas.

For sale queries (USA, UK, V8, 2410, 24-34) have no prices here. The buy question in this catalogue is 85 hp 2.5 MT versus 100 hp 2.5 MT. If you need a measured mixed figure, a measured gross mass, and the lower city number, take first-generation 2.5 MT. If you need the higher horsepower, the higher torque, the faster 0–100, and Independent, spring front, take second-generation 2.5 MT.