1951 Alvis TB 21 vs. 2004 Audi S4
To start off, 2004 Audi S4 is newer by 53 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 4,170 cc (8 cylinders), 2004 Audi S4 is equipped with a bigger engine. In terms of performance, 2004 Audi S4 (339 HP @ 7000 RPM) has 248 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2004 Audi S4 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2004 Audi S4 (410 Nm) has 206 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2004 Audi S4 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 | 2004 Audi S4 | |
| Make | Alvis | Audi |
| Model | TB 21 | S4 |
| Year Released | 1951 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4170 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 5 valves |
| Horse Power | 91 HP | 339 HP |
| Engine RPM | 4000 RPM | 7000 RPM |
| Torque | 204 Nm | 410 Nm |
| Engine Bore Size | 84 mm | 84.5 mm |
| Engine Stroke Size | 90 mm | 92.8 mm |
| Engine Compression Ratio | 7.1:1 | 11.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4590 mm |
| Vehicle Width | 1680 mm | 1780 mm |
| Wheelbase Size | 2750 mm | 2430 mm |
