2003 BMW 645 vs. 2013 Porsche Panamera
To start off, 2013 Porsche Panamera is newer by 10 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,800 cc (8 cylinders), 2013 Porsche Panamera is equipped with a bigger engine. In terms of performance, 2013 Porsche Panamera (493 HP @ 6000 RPM) has 172 more horse power than 2003 BMW 645. (321 HP @ 6100 RPM) In normal driving conditions, 2013 Porsche Panamera should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2013 Porsche Panamera weights approximately 75 kg more than 2003 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2013 Porsche Panamera is all wheel drive (AWD), it will have significant more traction and grip than 2003 BMW 645. In wet, icy, snow, or gravel driving conditions, 2013 Porsche Panamera will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2013 Porsche Panamera (700 Nm @ 4500 RPM) has 250 more torque (in Nm) than 2003 BMW 645. (450 Nm @ 3600 RPM). This means 2013 Porsche Panamera will have an easier job in driving up hills or pulling heavy equipment than 2003 BMW 645.
Compare all specifications:
| 2003 BMW 645 | 2013 Porsche Panamera | |
| Make | BMW | Porsche |
| Model | 645 | Panamera |
| Year Released | 2003 | 2013 |
| Body Type | Convertible | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 4800 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | V | single |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 321 HP | 493 HP |
| Engine RPM | 6100 RPM | 6000 RPM |
| Torque | 450 Nm | 700 Nm |
| Torque RPM | 3600 RPM | 4500 RPM |
| Engine Bore Size | 92 mm | 96 mm |
| Engine Stroke Size | 82.7 mm | 83 mm |
| Top Speed | 250 km/hour | 303 km/hour |
| Acceleration 0-100mph | 6.2 seconds | 3.8 seconds |
| Drive Type | Rear | AWD |
| Transmission Type | Automatic | Single Speed |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1895 kg | 1970 kg |
| Vehicle Length | 4830 mm | 4970 mm |
| Vehicle Width | 1860 mm | 2114 mm |
| Vehicle Height | 1380 mm | 1418 mm |
| Wheelbase Size | 2790 mm | 2920 mm |
| Fuel Consumption | 8.5 L/100km | 8.6 L/100km |
| Fuel Consumption City | 16.8 L/100km | 14.1 L/100km |
