Comparison Mercedes-Benz C123 300 CD (78 Hp) Automatic & Porsche Type 3.3 Turbo (282 Hp)
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| Brand: | Mercedes-Benz | Porsche |
| Model: | W123 | 911 |
| Generation: | C123 | Type |
| Engine / modification: | 300 CD (78 Hp) Automatic | 3.3 Turbo (282 Hp) |
| Production start: | 1977 year | 1984 year |
| Production end: | 1979 year | 1989 year |
| Coupe type: | Coupe | Coupe |
| Num. of Doors: | 2 | 2 |
| Num. of seats: | 4 | 4 |
| Fuel consumption / economy - urban: | 15.5 l/100 km | |
| Fuel consumption / economy - extra urban: | 9.7 l/100 km | |
| Fuel consumption / economy - combined: | 11.5 l/100 km | |
| Fuel Type: | Diesel | Petrol (Gasoline) |
| Fuel tank volume: | 80 l | 85 l |
| Power: | 78 hp | 282 hp |
| Max power in: | 4400 rpm. | 5500 rpm. |
| Maximum speed: | 143 km/h | 260 km/h |
| Acceleration from 0 to 100 km/h: | 20.8 sec | 5.4 sec |
| Torque: | 156 Nm @ 2400 rpm. | 390 Nm @ 4000 rpm. |
| Model Engine: | OM 617 D 30 / 617.912 | 930.68 |
| Engine position: | Front, longitudinal | Rear, longitudinal |
| Engine displacement: | 3005 cm3 | 3299 cm3 |
| Engine oil capacity: | 7.5 l | 13 l |
| Coolant: | 11 l | |
| Maximum engine speed: | 6000 rpm. | |
| Position of cylinders: | Inline | Boxer |
| Valvetrain: | SOHC | SOHC |
| Number of cylinders: | 5 | 6 |
| Number of valves per cylinder: | 2 | 2 |
| Compression ratio: | 21.5 | 7 |
| Piston Stroke: | 92.4 mm | 74.4 mm |
| Cylinder Bore: | 91 mm | 97 mm |
| Wheel Drive: | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 4 | |
| Number of Gears (manual transmission): | 5 | |
| Length: | 4763 mm | 4291 mm |
| Width: | 1786 mm | 1775 mm |
| Height: | 1395 mm | 1310 mm |
| Wheelbase: | 2710 mm | 2272 mm |
| Front track: | 1488 mm | 1432 mm |
| Rear (Back) track: | 1446 mm | 1501 mm |
| Ride height(clearance): | 120 mm | |
| Approach angle: | 14.5 ° | |
| Departure angle: | 16 ° | |
| Front suspension: | Double wishbone | |
| Max weight: | 2015 kg | 1680 kg |
| Front brakes: | Disc | |
| Rear brakes: | Disc | |
| Kerb Weight: | 1550 kg | 1335 kg |
| Steering type: | Cone worm with recirculation balls | |
| Power steering: | Hydraulic Steering | |
| Max. roof load: | 75 kg | |
| Minimum turning circle (turning diameter): | 10.95 m | |
| Tire size: | Front wheel tires: 195/70 R14 | Front wheel tires: 205/55 R16 |
| Wheel rims size: | Front wheel rims: 6J x 14 | Front wheel rims: 7J x 16 |