Mercedes 2-litre "Targa Florio" racing car, 1924

Engine type:
M 7294
Inlet valves:
2 inclined overhead valves per cylinder, actuated via tappets
Ignition sequence:
1-3-4-2
No. of cylinders / arrangement:
4 / in line
Outlet valves:
2 inclined overhead valves per cylinder, actuated via tappets
Configuration:
Front, longitudinal; vertical
Valve operation:
2 overhead camshafts, vertical-shaft drive
Combustion principle:
Four-stroke Otto (with supercharger)
Crankshaft:
3-bearing (roller bearings), built-up crankshaft
Bore x Stroke:
70 x 129 mm
Fuel system:
1 Pressurized updraft carburetor / Roots supercharger
Total displacement:
1989 cc
Spark plugs:
1 per cylinder
Fuel supply:
Air pressure, via hand pump operated by co-driver
Compression ratio:
4.5
Maximum / output / rated output:
67.5 hp without, 126 hp with supercharger
Cooling:
Water circulation cooling via rotary pump
Maximum revolutions:
4500 /min
Lubrication:
Pressure circulation lubrication via gear pump with fresh oil addition
Cylinders:
Steel cylinders in a block with welded-on cooling-water jacket
Cylinder head:
Not removable, welded together with cylinders
Starter:
Starting crank
Generator:
Not fitted
Battery:
Not fitted
Ignition:
High-voltage magneto ignition
Ignition system:
Bosch magneto

Hand brake:
Acting on rear wheels
Foot brake:
Acting on front- and rear wheels
Steering:
Worm-and-nut steering
Wheels:
Wire-spoke wheels, center mounting
Front tires:
765 x 105
Frame design:
U-section pressed-steel frame
Rear tires:
765 x 105
Front wheel suspension:
Rigid axle with semi-elliptic springs, friction shock absorbers
Drivetrain:
By cardan shaft to differential and rear wheels
Rear wheel suspension:
Rigid axle with underslung semi-elliptic springs, friction shock absorbers
Brake system:
Mechanically actuated
Front brakes:
Inside shoe brakes
Rear brakes:
Inside shoe brakes (rear wheels)