Comparison Porsche 911 Cabriolet (997, facelift 2008) Turbo S 3.8 (530 Hp) PDK & Mercedes-Benz S-class Coupe (C140) S 420 V8 (279 Hp) 5G-TRONIC & Mercedes-Benz C-class T-mod (S204 facelift 2011) C 250 (204 Hp) G-TRONIC
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| Brand: | Porsche | Mercedes-Benz | Mercedes-Benz |
| Model: | 911 | S-class | C-class |
| Generation: | 911 Cabriolet (997, facelift 2008) | S-class Coupe (C140) | C-class T-mod (S204 facelift 2011) |
| Engine / modification: | Turbo S 3.8 (530 Hp) PDK | S 420 V8 (279 Hp) 5G-TRONIC | C 250 (204 Hp) G-TRONIC |
| Production start: | 2010 year | 1995 year | 2011 year |
| Production end: | 2011 year | 1996 year | |
| Coupe type: | Cabriolet | Coupe | Combi |
| Num. of Doors: | 2 | 2 | 5 |
| Num. of seats: | 4 | 4 | 5 |
| Fuel consumption / economy - urban: | 16.7 l/100 km | 15.6 l/100 km | 9.1-8.9 l/100 km |
| Fuel consumption / economy - extra urban: | 8.2 l/100 km | 8.7-10.4 l/100 km | 5.7-5.4 l/100 km |
| Fuel consumption / economy - combined: | 11.3 l/100 km | 6.9-6.7 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | ||
| Fuel tank volume: | 67 l | 100 l | 59 l |
| Emission standard: | Euro 5 | EURO V | |
| CO2 emissions: | 270 g/km | 162-155 g/km | |
| Power: | 530 hp | 279 hp | 204 hp |
| Max power in: | 6250-6750 rpm. | 5700 rpm. | 5500 rpm. |
| Maximum speed: | 315 km/h | 250 , Electronically limited km/h | 233 km/h |
| Acceleration from 0 to 100 km/h: | 3.4 sec | 8.5 sec | 7.4 sec |
| Torque: | 700 Nm @ 2100-4250 rpm. | 400 Nm @ 3900 rpm. | 310 Nm/2000-4300 rpm. |
| Model Engine: | MA1.70S | M 119.981 | M 271 DE 18 AL |
| Engine position: | Rear, longitudinal | Front, longitudinal | Front, longitudinal |
| Engine displacement: | 3800 cm3 | 4196 cm3 | 1796 cm3 |
| Engine oil capacity: | 7.5 l | 8 l | |
| Coolant: | 29-32 l | 16.5 l | |
| Fuel System: | Direct injection | Direct injection | |
| Aspiration / Turbine: | Turbocharger | Turbocharging | |
| Position of cylinders: | Boxer | Inline | |
| Valvetrain: | DOHC | ||
| Number of cylinders: | 6 | 8 | 4 |
| Number of valves per cylinder: | 4 | 4 | |
| Compression ratio: | 11 | 9.3 | |
| Piston Stroke: | 78.9 mm | ||
| Cylinder Bore: | 92 mm | ||
| Wheel Drive: | All wheel drive (4x4) | Rear wheel drive | Rear wheel drive |
| Number of Gears (automatic transmission): | 5 G-TRONIC | 7G-TRONIC PLUS | |
| Number of Gears (manual transmission): | 7 PDK | ||
| Length: | 4450 mm | 5065 mm | 4606 mm |
| Width: | 1852 mm | 1912 mm | 1770 mm |
| Width including mirrors: | 1952 mm | ||
| Height: | 1300 mm | 1452 mm | 1459 mm |
| Wheelbase: | 2350 mm | 2945 mm | 2760 mm |
| Front track: | 1614 mm | 1541 mm | |
| Rear (Back) track: | 1587 mm | 1544 mm | |
| Minimum volume of Luggage (trunk): | 485 l | ||
| Maximum amount of Luggage (trunk): | 105 l | 1500 l | |
| Front suspension: | McPherson | Independent multi-link | |
| Rear suspension: | Multi-link independent | Multi-link independent | |
| Max weight: | 2010 kg | 2600 kg | 2115 kg |
| Front brakes: | Ventilated discs | Ventilated discs | Ventilated discs |
| Rear brakes: | Ventilated discs | Ventilated discs | Disc |
| Kerb Weight: | 1660 kg | 2005 kg | 1575 kg |
| ABS: | yes | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls | Steering rack and pinion |
| Power steering: | Hydraulic Steering | Hydraulic Steering | Electric Steering |
| Minimum turning circle (turning diameter): | 10.9 m | 11.91 m | 10.84 m |
| Tire size: | 235/35 ZR19; 305/30 ZR19 | 255/45 R18 | 205/55 R 16 |
| Wheel rims size: | 8.5J x 19; 11J x 19 | 8.5J x 18 | R16 |