1951 Alvis TB 21 vs. 1958 Bristol 406
To start off, 1958 Bristol 406 is newer by 7 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 2,993 cc (6 cylinders), 1951 Alvis TB 21 is equipped with a bigger engine. In terms of performance, both vehicles can yield 91 horse power. So under normal driving conditions, the acceleration of both vehicles should be relatively similar.
Let's talk about torque, 1951 Alvis TB 21 (204 Nm) has 30 more torque (in Nm) than 1958 Bristol 406. (174 Nm). This means 1951 Alvis TB 21 will have an easier job in driving up hills or pulling heavy equipment than 1958 Bristol 406.
Compare all specifications:
| 1951 Alvis TB 21 | 1958 Bristol 406 | |
| Make | Alvis | Bristol |
| Model | TB 21 | 406 |
| Year Released | 1951 | 1958 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2216 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 91 HP |
| Engine RPM | 4000 RPM | 4700 RPM |
| Torque | 204 Nm | 174 Nm |
| Engine Bore Size | 84 mm | 68.7 mm |
| Engine Stroke Size | 90 mm | 99.6 mm |
| Engine Compression Ratio | 7.1:1 | 8.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4990 mm |
| Vehicle Width | 1680 mm | 1730 mm |
| Wheelbase Size | 2750 mm | 2900 mm |
