1951 Alvis TB 21 vs. 1983 BMW 725
To start off, 1983 BMW 725 is newer by 32 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, 1983 BMW 725 (148 HP @ 5500 RPM) has 57 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1983 BMW 725 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1983 BMW 725 (215 Nm) has 11 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1983 BMW 725 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 | 1983 BMW 725 | |
| Make | Alvis | BMW |
| Model | TB 21 | 725 |
| Year Released | 1951 | 1983 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2495 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 148 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 204 Nm | 215 Nm |
| Engine Compression Ratio | 7.1:1 | 9.6:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4870 mm |
| Vehicle Width | 1680 mm | 1810 mm |
| Wheelbase Size | 2750 mm | 2810 mm |
