1952 Alvis TB 21 vs. 2004 BMW 645
To start off, 2004 BMW 645 is newer by 52 year(s). Which means there will be less support and parts availability for 1952 Alvis TB 21. In addition, the cost of maintenance, including insurance, on 1952 Alvis TB 21 would be higher. At 4,392 cc (8 cylinders), 2004 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 BMW 645 (322 HP @ 7400 RPM) has 231 more horse power than 1952 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2004 BMW 645 should accelerate faster than 1952 Alvis TB 21.
Let's talk about torque, 2004 BMW 645 (447 Nm) has 243 more torque (in Nm) than 1952 Alvis TB 21. (204 Nm). This means 2004 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 1952 Alvis TB 21.
Compare all specifications:
| 1952 Alvis TB 21 | 2004 BMW 645 | |
| Make | Alvis | BMW |
| Model | TB 21 | 645 |
| Year Released | 1952 | 2004 |
| Engine Position | Front | Front |
| Engine Size | 2992 cc | 4392 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 322 HP |
| Engine RPM | 4000 RPM | 7400 RPM |
| Torque | 204 Nm | 447 Nm |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 90 mm | 83 mm |
| Engine Compression Ratio | 7.1:1 | 10.5:1 |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4840 mm |
| Vehicle Width | 1680 mm | 1860 mm |
| Wheelbase Size | 2750 mm | 2790 mm |
