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Mercedes-Benz W123 Saloon – 250 2.5 petrol

W123 · 123.026 · 95 kW / 129 hp

1976 - 1979 · Petrol

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101 parts matched to this engine · 11 departments

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Car Details

Details may vary by version.

Engine

Fuel
Petrol
Made
1976 - 1979
Engine code
M 123 V 25 / 123.920
Engine size
2,525 cc (2.5 litres)
Engine power
129 hp (95 kW) at 5,500 rpm
Torque (pulling power)
196 Nm at 3,500 rpm
Cylinders
6, in a row (inline)
Turbo
No turbo (naturally aspirated)
Fuel injection
Carburettor
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Valves
12 (2 per cylinder)
Valve system
SOHC
Bore x stroke
86 x 72.45 mm
Compression ratio
8.7:1
Engine position
Front, lengthways (longitudinal)
Catalytic converter
No catalytic converter

Fluids and capacities

Engine oil amount
7.5 litres
Engine oil grade
10W-40 or 15W-40
Coolant
10 litres
Fuel tank
80 litres

Engine Oils for This Car →Coolants for This Car →

Gearbox and drive

Gearbox
4-speed manual or 4-speed automatic
Driven wheels
Rear-wheel drive

Wheels, brakes, suspension and steering

Wheel (rim) size
5.5J x 14
Front brakes
Discs
Rear brakes
Discs
Steering
Recirculating ball
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Front suspension
Double wishbone
Rear suspension
Trailing arm

Size and weight

Body style
Saloon (sedan)
Seats
5
Doors
4
Length
4,725 mm
Width
1,786 mm
Height
1,438 mm
Weight (empty)
1,410 kg
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Wheelbase
2,795 mm
Front track
1,488 mm
Rear track
1,446 mm
Maximum weight (loaded)
1,930 kg
Load it can carry
520 kg

Speed and fuel use

Fuel use in town
16 to 16.4 l/100 km (about 6.1 to 6.3 km per litre)
Fuel use on the highway
9.8 to 10.1 l/100 km (about 9.9 to 10.2 km per litre)
Top speed
180 to 185 km/h
0 to 100 km/h
11.3 to 12.2 seconds

Fuel use is from official tests; town driving usually uses more.