2005 Alpina Roadster vs. 2007 Audi S4
To start off, 2007 Audi S4 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 Alpina Roadster. In addition, the cost of maintenance, including insurance, on 2005 Alpina Roadster would be higher. At 4,163 cc (8 cylinders), 2007 Audi S4 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (341 HP @ 7000 RPM) has 40 more horse power than 2005 Alpina Roadster. (301 HP @ 6300 RPM) In normal driving conditions, 2007 Audi S4 should accelerate faster than 2005 Alpina Roadster.
Let's talk about torque, 2007 Audi S4 (410 Nm @ 3500 RPM) has 48 more torque (in Nm) than 2005 Alpina Roadster. (362 Nm @ 4800 RPM). This means 2007 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2005 Alpina Roadster.
Compare all specifications:
| 2005 Alpina Roadster | 2007 Audi S4 | |
| Make | Alpina | Audi |
| Model | Roadster | S4 |
| Year Released | 2005 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 3346 cc | 4163 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 301 HP | 341 HP |
| Engine RPM | 6300 RPM | 7000 RPM |
| Torque | 362 Nm | 410 Nm |
| Torque RPM | 4800 RPM | 3500 RPM |
| Engine Bore Size | 87 mm | 84.6 mm |
| Engine Stroke Size | 93.8 mm | 92.7 mm |
| Engine Compression Ratio | 10.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline |
| Transmission Type | Manual | Manual |
| Number of Seats | 2 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Length | 4100 mm | 4590 mm |
| Vehicle Width | 1790 mm | 1730 mm |
| Vehicle Height | 1300 mm | 1430 mm |
| Wheelbase Size | 2500 mm | 2650 mm |
| Fuel Tank Capacity | 55 L | 63 L |
