Hartge H1 (E31)
Description
The Hartge H1 was a modified model of the BMW 850Ci (E31 body), produced from 1987 to 1999.
The 12-cylinder version of the BMW engine was originally a five-liter, but to increase power, the volume was increased to 6 liters. The cylinder head, intake and exhaust channels were modified, the piston was replaced with a forged one, the exhaust system was replaced and, as a result, the power increased from 300 to 430 hp, and the torque from 450 to 620 N∙m.
With such a motor, far from being the lightest car, it could accelerate to 100 kph in 5.3 seconds and reach a maximum speed of 301 kph.
In addition to the refinement of the engine, the changes affected the brake system and suspension, as a result of which the ground clearance was lowered by 30 mm.
The main changes in the appearance of the car were the installation of Hartge rims and a small body kit.
Sources
Specification
| Bodywork | |
|---|---|
| Years of production | 
             1994-1996 
       | 
| Body type | 
             купе 
       | 
| Number of doors | 
             2 
       | 
| Number of places | 
             4 
       | 
| Engine | |
|---|---|
| Engine type | 
             бензиновый 
       | 
| Engine location | 
             спереди, продольное 
       | 
| Engine model | 
             BMW M70B50 
       | 
| Cylinders | 
             V12 
       | 
| V-angle | 
             60° 
       | 
| Cylinder operation | 
             1-7-5-11-3-9-6-12-2-8-4-10 
       | 
| Capacity (cc) | 
             5992 
       | 
| Power output (hp / kW /) | 
       430 / 
              321 / 
           | 
| at rpm | 
             5250 
       | 
| Torque (N·m) | 
             620 
       | 
| at rpm | 
             3750 
       | 
| Bore (mm) | 
             89,0 
       | 
| Stroke (mm) | 
             89,0 
       | 
| Number of valves | 
             2/24 
       | 
| Valvetrain | 
             OHC 
       | 
| Block material | 
             алюминиевый сплав 
       | 
| Fuel system | 
             впрыск 
       | 
| Fuel system model | 
             Bosch 
       | 
| Turbocharger | 
             — 
       | 
| Specific | |
|---|---|
| Specific output (hp/litre) | 
             71,76 
       | 
| Specific output (hp/tonne) | 
             230,56 
       | 
| Specific output (kg/hp) | 
             4,34 
       | 
| Specific torque (N·m/litre) | 
             103,47 
       | 
| Specific torque (N·m/tonne) | 
             332,44 
       | 
| Transmission | |
|---|---|
| Driven wheels | 
             задний 
       | 
| Gearbox model | 
             Getrag 
       | 
| Gearbox | 
             механическая 
       | 
| Number of speeds | 
             6 
       | 
| Final drive ratio | 
             2,930 
       | 
| First gear ratio | 
             4,250 
       | 
| Second gear ratio | 
             2,530 
       | 
| Third gear ratio | 
             1,680 
       | 
| Fourth gear ratio | 
             1,240 
       | 
| Fifth gear ratio | 
             1,000 
       | 
| Sixth gear ratio | 
             0,830 
       | 
| Suspension | |
|---|---|
| Front suspension | 
             макферсон 
       | 
| Rear suspension | 
             независимая многорычажная 
       | 
| Elastic elements in front | 
             пружины 
       | 
| Elastic elements in rear | 
             пружины 
       | 
| Front anti-roll bar | |
| Rear anti-roll bar | |
| Wheels brand | 
             Hartge 
       | 
| Tyres front | 
             245/40 R18 
       | 
| Tyres rear | 
             285/35 R18 
       | 
| Steering | |
|---|---|
| Steering type | 
             шестерня-рейка 
       | 
| Power steering | 
             гидравлический 
       | 
| Turning diameter (m) | 
             11,5 
       | 
| Brakes specs | |
|---|---|
| Brakes front | 
             дисковые вентилируемые 
       | 
| Brakes rear | 
             дисковые вентилируемые 
       | 
| Brand of brakes | 
             324 
       | 
| Disc material | 
             чугун 
       | 
| Anti-lock braking system | 
             да 
       | 
| Dimensions and weight | |
|---|---|
| Body | 
             несущий 
       | 
| Body material | 
             сталь 
       | 
| Length (mm) | 
             4780 
       | 
| Width (mm) | 
             1854 
       | 
| Height (mm) | 
             1305 
       | 
| Wheelbase (mm) | 
             2684 
       | 
| Front track (mm) | 
             1554 
       | 
| Rear track (mm) | 
             1562 
       | 
| Ground clearance (mm) | 
             110 
       | 
| Drag coefficien | 
             0,290 
       | 
| Curb weight (kg) | 
             1865 
       | 
| Max. weight (kg) | 
             2280 
       | 
| Trunk volume max (litre) | 
             320 
       | 
| Performance specs | |
|---|---|
| Fuel tank capacity (l) | 
             90 
       | 
| Fuel type | 
             Аи-98 
       | 
| Dynamic specs | |
|---|---|
| Acceleration 0-100 kph (s) | 
             5,3 
       | 
| Top speed (kph) | 
             301 
       | 
|---|---|
| Top speed (mph) | 
             187 
       | 
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