1951 Alvis TB 21 vs. 2009 Audi RS4
To start off, 2009 Audi RS4 is newer by 58 year(s). Which means there will be less support and parts availability for 1951 Alvis TB 21. In addition, the cost of maintenance, including insurance, on 1951 Alvis TB 21 would be higher. At 4,163 cc (8 cylinders), 2009 Audi RS4 is equipped with a bigger engine. In terms of performance, 2009 Audi RS4 (414 HP @ 7800 RPM) has 323 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2009 Audi RS4 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2009 Audi RS4 (430 Nm) has 226 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2009 Audi RS4 will have an easier job in driving up hills or pulling heavy equipment than 1951 Alvis TB 21.
Compare all specifications:
| 1951 Alvis TB 21 | 2009 Audi RS4 | |
| Make | Alvis | Audi |
| Model | TB 21 | RS4 |
| Year Released | 1951 | 2009 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4163 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 414 HP |
| Engine RPM | 4000 RPM | 7800 RPM |
| Torque | 204 Nm | 430 Nm |
| Engine Bore Size | 84 mm | 84.5 mm |
| Engine Stroke Size | 90 mm | 92.8 mm |
| Engine Compression Ratio | 7.1:1 | 12.5:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4560 mm |
| Vehicle Width | 1680 mm | 1820 mm |
| Wheelbase Size | 2750 mm | 2660 mm |
