Comparison Porsche 911 Cabriolet (997, facelift 2008) Turbo 3.8 (500 Hp) PDK & GMC Sierra 3500HD V (GMTT1XX, facelift 2024) Crew Cab Long Bed 6.6 V8 (401 Hp) 4WD DRW Automatic
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| Brand: | Porsche | GMC |
| Model: | 911 | Sierra 3500HD |
| Generation: | 911 Cabriolet (997, facelift 2008) | Sierra 3500HD V (GMTT1XX, facelift 2024) Crew Cab Long Bed |
| Engine / modification: | Turbo 3.8 (500 Hp) PDK | 6.6 V8 (401 Hp) 4WD DRW Automatic |
| Production start: | 2009 year | 2024 year |
| Production end: | 2011 year | |
| Coupe type: | Cabriolet | Pick-up |
| Powertrain Architecture: | Internal Combustion engine | |
| Num. of Doors: | 2 | 4 |
| Num. of seats: | 4 | 5 |
| Fuel consumption / economy - urban: | 16.7 l/100 km | |
| Fuel consumption / economy - extra urban: | 8.2 l/100 km | |
| Fuel consumption / economy - combined: | 11.5 l/100 km | |
| Fuel Type: | Petrol (Gasoline) | Petrol (Gasoline) |
| Drag coefficient: | 0.32 | |
| Fuel tank volume: | 67 l | 136 l |
| Emission standard: | Euro 5 | |
| CO2 emissions: | 270 g/km | |
| Power: | 500 hp | 401 hp |
| Max power in: | 6000-6500 rpm. | 5200 rpm. |
| Maximum speed: | 312 km/h | |
| Acceleration from 0 to 100 km/h: | 3.5-3.7 sec | |
| Torque: | 650 Nm @ 1950-5000 rpm. | 629 Nm @ 4000 rpm. |
| Model Engine: | MA1.70 | L8T |
| Engine position: | Rear, longitudinal | |
| Engine displacement: | 3800 cm3 | |
| Engine oil capacity: | 7.5 l | 7.6 l |
| Coolant: | 29-32 l | 14.6 l |
| Fuel System: | Direct injection | |
| Aspiration / Turbine: | Turbocharger | Naturally aspirated engine |
| Position of cylinders: | Boxer | |
| Valvetrain: | OHV | |
| Number of cylinders: | 6 | 8 |
| Number of valves per cylinder: | 2 | |
| Compression ratio: | 9.8 | 10.8 |
| Piston Stroke: | 98 mm | |
| Cylinder Bore: | 103.25 mm | |
| Wheel Drive: | All wheel drive (4x4) | All wheel drive (4x4) |
| Number of Gears (automatic transmission): | 7 PDK | |
| Length: | 4450 mm | 6776 mm |
| Width: | 1852 mm | |
| Width including mirrors: | 1952 mm | 2457 mm |
| Height: | 1300 mm | 2049 mm |
| Wheelbase: | 2350 mm | 4369 mm |
| Front track: | 1731 mm | |
| Rear (Back) track: | 1905 mm | |
| Ride height(clearance): | 264 mm | |
| Maximum amount of Luggage (trunk): | 105 l | |
| Front suspension: | McPherson | Independent torsion bar, double wishbone |
| Rear suspension: | Multi-link independent | |
| Max weight: | 2020 kg | 6350 kg |
| Front brakes: | Ventilated discs | |
| Rear brakes: | Ventilated discs | |
| Kerb Weight: | 1670 kg | 3335 kg |
| ABS: | yes | |
| Steering type: | Steering rack and pinion | Cone worm with recirculation balls |
| Power steering: | Hydraulic Steering | Hydraulic Steering |
| Minimum turning circle (turning diameter): | 10.9 m | |
| Permitted trailer load with brakes (12%): | 8074 kg | |
| Tire size: | 235/35 ZR19; 305/30 ZR19 | 235/80 R17; 235/80 R18 |
| Wheel rims size: | 8.5J x 19; 11J x 19 | 6.5J x 17; 8J x 18 |