1951 Alvis TB 21 vs. 1999 BMW 540
To start off, 1999 BMW 540 is newer by 48 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 4,398 cc (8 cylinders), 1999 BMW 540 is equipped with a bigger engine. In terms of performance, 1999 BMW 540 (282 HP @ 7400 RPM) has 191 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1999 BMW 540 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1999 BMW 540 (439 Nm) has 235 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1999 BMW 540 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 | 1999 BMW 540 | |
| Make | Alvis | BMW |
| Model | TB 21 | 540 |
| Year Released | 1951 | 1999 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4398 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 282 HP |
| Engine RPM | 4000 RPM | 7400 RPM |
| Torque | 204 Nm | 439 Nm |
| Engine Compression Ratio | 7.1:1 | 10.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4780 mm |
| Vehicle Width | 1680 mm | 1810 mm |
| Wheelbase Size | 2750 mm | 2840 mm |
