2008 BMW M5 vs. 2003 Mazda Roadster
To start off, 2008 BMW M5 is newer by 5 year(s). Which means there will be less support and parts availability for 2003 Mazda Roadster. In addition, the cost of maintenance, including insurance, on 2003 Mazda Roadster would be higher. At 4,999 cc (10 cylinders), 2008 BMW M5 is equipped with a bigger engine. In terms of performance, 2008 BMW M5 (500 HP @ 7750 RPM) has 352 more horse power than 2003 Mazda Roadster. (148 HP @ 7000 RPM). In normal driving conditions, 2008 BMW M5 should accelerate faster than 2003 Mazda Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2008 BMW M5 weights approximately 750 kg more than 2003 Mazda Roadster. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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, 2008 BMW M5 (520 Nm @ 6100 RPM) has 353 more torque (in Nm) than 2003 Mazda Roadster. (167 Nm @ 5500 RPM). This means 2008 BMW M5 will have an easier job in driving up hills or pulling heavy equipment than 2003 Mazda Roadster.
Compare all specifications:
| 2008 BMW M5 | 2003 Mazda Roadster | |
| Make | BMW | Mazda |
| Model | M5 | Roadster |
| Year Released | 2008 | 2003 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4999 cc | 1838 cc |
| Engine Cylinders | 10 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 500 HP | 148 HP |
| Engine RPM | 7750 RPM | 7000 RPM |
| Torque | 520 Nm | 167 Nm |
| Torque RPM | 6100 RPM | 5500 RPM |
| Engine Bore Size | 92 mm | 83 mm |
| Engine Stroke Size | 75.2 mm | 85 mm |
| Engine Compression Ratio | 12.0:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1830 kg | 1080 kg |
| Vehicle Length | 4860 mm | 3960 mm |
| Vehicle Width | 1850 mm | 1690 mm |
| Vehicle Height | 1480 mm | 1240 mm |
| Wheelbase Size | 2900 mm | 2270 mm |
| Fuel Tank Capacity | 70 L | 48 L |
