2007 BMW M3 vs. 2003 Mazda Roadster
To start off, 2007 BMW M3 is newer by 4 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 3,245 cc (6 cylinders), 2007 BMW M3 is equipped with a bigger engine. In terms of performance, 2007 BMW M3 (338 HP @ 7900 RPM) has 190 more horse power than 2003 Mazda Roadster. (148 HP @ 7000 RPM). In normal driving conditions, 2007 BMW M3 should accelerate faster than 2003 Mazda Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2007 BMW M3 weights approximately 575 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, 2007 BMW M3 (365 Nm @ 4900 RPM) has 198 more torque (in Nm) than 2003 Mazda Roadster. (167 Nm @ 5500 RPM). This means 2007 BMW M3 will have an easier job in driving up hills or pulling heavy equipment than 2003 Mazda Roadster. 2003 Mazda Roadster has automatic transmission and 2007 BMW M3 has manual transmission. 2007 BMW M3 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 Mazda Roadster will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 BMW M3 | 2003 Mazda Roadster | |
| Make | BMW | Mazda |
| Model | M3 | Roadster |
| Year Released | 2007 | 2003 |
| Body Type | Convertible | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3245 cc | 1838 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 338 HP | 148 HP |
| Engine RPM | 7900 RPM | 7000 RPM |
| Torque | 365 Nm | 167 Nm |
| Torque RPM | 4900 RPM | 5500 RPM |
| Engine Bore Size | 87 mm | 83 mm |
| Engine Stroke Size | 91 mm | 85 mm |
| Engine Compression Ratio | 11.5:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1655 kg | 1080 kg |
| Vehicle Length | 4500 mm | 3960 mm |
| Vehicle Width | 1790 mm | 1690 mm |
| Vehicle Height | 1380 mm | 1240 mm |
| Wheelbase Size | 2740 mm | 2270 mm |
| Fuel Tank Capacity | 63 L | 48 L |
