2005 Alpina B3 vs. 2003 Mazda Roadster
To start off, 2005 Alpina B3 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 3,346 cc (6 cylinders), 2005 Alpina B3 is equipped with a bigger engine. In terms of performance, 2005 Alpina B3 (301 HP @ 6300 RPM) has 178 more horse power than 2003 Mazda Roadster. (123 HP @ 6500 RPM). In normal driving conditions, 2005 Alpina B3 should accelerate faster than 2003 Mazda Roadster. With that said, vehicle weight also plays an important factor in acceleration. 2005 Alpina B3 weights approximately 920 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 Alpina B3 (362 Nm @ 4800 RPM) has 220 more torque (in Nm) than 2003 Mazda Roadster. (142 Nm @ 5000 RPM). This means 2005 Alpina B3 will have an easier job in driving up hills or pulling heavy equipment than 2003 Mazda Roadster.
Compare all specifications:
| 2005 Alpina B3 | 2003 Mazda Roadster | |
| Make | Alpina | Mazda |
| Model | B3 | Roadster |
| Year Released | 2005 | 2003 |
| Body Type | Station Wagon | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3346 cc | 1598 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 301 HP | 123 HP |
| Engine RPM | 6300 RPM | 6500 RPM |
| Torque | 362 Nm | 142 Nm |
| Torque RPM | 4800 RPM | 5000 RPM |
| Engine Bore Size | 87.1 mm | 78 mm |
| Engine Stroke Size | 93.9 mm | 83.6 mm |
| Engine Compression Ratio | 10.0:1 | 9.4:1 |
| Drive Type | Rear | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1950 kg | 1030 kg |
| Vehicle Length | 4480 mm | 3960 mm |
| Vehicle Width | 1750 mm | 1690 mm |
| Vehicle Height | 1420 mm | 1240 mm |
| Wheelbase Size | 2730 mm | 2270 mm |
| Fuel Tank Capacity | 63 L | 48 L |
