2003 BMW 645 vs. 2005 Smart ForFour
To start off, 2005 Smart ForFour is newer by 2 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 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2003 BMW 645 (325 HP @ 6100 RPM) has 217 more horse power than 2005 Smart ForFour. (108 HP @ 6000 RPM). In normal driving conditions, 2003 BMW 645 should accelerate faster than 2005 Smart ForFour. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 715 kg more than 2005 Smart ForFour. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2003 BMW 645 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2003 BMW 645. However, in wet, icy, snow, or gravel driving conditions, 2005 Smart ForFour, being front wheel drive (FWD), will offer much better control with better grip. 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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 305 more torque (in Nm) than 2005 Smart ForFour. (145 Nm @ 4000 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 Smart ForFour.
Compare all specifications:
| 2003 BMW 645 | 2005 Smart ForFour | |
| Make | BMW | Smart |
| Model | 645 | ForFour |
| Year Released | 2003 | 2005 |
| Body Type | Coupe | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 4398 cc | 1499 cc |
| Engine Cylinders | 8 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 325 HP | 108 HP |
| Engine RPM | 6100 RPM | 6000 RPM |
| Torque | 450 Nm | 145 Nm |
| Torque RPM | 3600 RPM | 4000 RPM |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Top Speed | 250 km/hour | 185 km/hour |
| Acceleration 0-100mph | 5.9 seconds | 9.8 seconds |
| Drive Type | Rear | Front |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 5 doors |
| Vehicle Weight | 1690 kg | 975 kg |
| Vehicle Length | 4830 mm | 3760 mm |
| Vehicle Width | 1860 mm | 1690 mm |
| Vehicle Height | 1380 mm | 1460 mm |
| Wheelbase Size | 2890 mm | 2510 mm |
| Fuel Consumption Overall | 11.7 L/100km | 6.1 L/100km |
| Fuel Tank Capacity | 70 L | 47 L |
