2005 BMW 730 vs. 2003 Mazda Roadster
To start off, 2005 BMW 730 is newer by 2 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 2,979 cc (6 cylinders), 2005 BMW 730 is equipped with a bigger engine. In terms of performance, 2005 BMW 730 (225 HP @ 4000 RPM) has 68 more horse power than 2003 Mazda Roadster. (157 HP @ 7000 RPM). In normal driving conditions, 2005 BMW 730 should accelerate faster than 2003 Mazda Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2005 BMW 730 weights approximately 915 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, 2005 BMW 730 (500 Nm @ 2000 RPM) has 330 more torque (in Nm) than 2003 Mazda Roadster. (170 Nm @ 5500 RPM). This means 2005 BMW 730 will have an easier job in driving up hills or pulling heavy equipment than 2003 Mazda Roadster. 2005 BMW 730 has automatic transmission and 2003 Mazda Roadster has manual transmission. 2003 Mazda Roadster will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2005 BMW 730 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2005 BMW 730 | 2003 Mazda Roadster | |
| Make | BMW | Mazda |
| Model | 730 | Roadster |
| Year Released | 2005 | 2003 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2979 cc | 1839 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 225 HP | 157 HP |
| Engine RPM | 4000 RPM | 7000 RPM |
| Torque | 500 Nm | 170 Nm |
| Torque RPM | 2000 RPM | 5500 RPM |
| Engine Bore Size | 84.1 mm | 83 mm |
| Engine Stroke Size | 90 mm | 85 mm |
| Engine Compression Ratio | 18.0:1 | 10.5:1 |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1975 kg | 1060 kg |
| Vehicle Length | 5050 mm | 3960 mm |
| Vehicle Width | 1910 mm | 1690 mm |
| Vehicle Height | 1500 mm | 1240 mm |
| Wheelbase Size | 2890 mm | 2370 mm |
| Fuel Tank Capacity | 88 L | 48 L |
