1952 Alvis TB 21 vs. 1999 BMW X5
To start off, 1999 BMW X5 is newer by 47 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 4,398 cc (8 cylinders), 1999 BMW X5 is equipped with a bigger engine. In terms of performance, 1999 BMW X5 (282 HP @ 5400 RPM) has 191 more horse power than 1952 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1999 BMW X5 should accelerate faster than 1952 Alvis TB 21.
Let's talk about torque, 1999 BMW X5 (439 Nm @ 3600 RPM) has 235 more torque (in Nm) than 1952 Alvis TB 21. (204 Nm @ 2200 RPM). This means 1999 BMW X5 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 | 1999 BMW X5 | |
| Make | Alvis | BMW |
| Model | TB 21 | X5 |
| Year Released | 1952 | 1999 |
| Engine Position | Front | Front |
| Engine Size | 2992 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 | 5400 RPM |
| Torque | 204 Nm | 439 Nm |
| Torque RPM | 2200 RPM | 3600 RPM |
| Engine Bore Size | 84 mm | 92 mm |
| Engine Stroke Size | 90 mm | 82.7 mm |
| Engine Compression Ratio | 7.1:1 | 10.0:1 |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4670 mm |
| Vehicle Width | 1680 mm | 1880 mm |
| Wheelbase Size | 2750 mm | 2730 mm |
