1952 Alvis TB 21 vs. 1989 BMW 850
To start off, 1989 BMW 850 is newer by 37 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 4,988 cc (12 cylinders), 1989 BMW 850 is equipped with a bigger engine. In terms of performance, 1989 BMW 850 (296 HP @ 5200 RPM) has 205 more horse power than 1952 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1989 BMW 850 should accelerate faster than 1952 Alvis TB 21.
Let's talk about torque, 1989 BMW 850 (450 Nm @ 4100 RPM) has 246 more torque (in Nm) than 1952 Alvis TB 21. (204 Nm @ 2200 RPM). This means 1989 BMW 850 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 | 1989 BMW 850 | |
| Make | Alvis | BMW |
| Model | TB 21 | 850 |
| Year Released | 1952 | 1989 |
| Engine Position | Front | Front |
| Engine Size | 2992 cc | 4988 cc |
| Engine Cylinders | 6 cylinders | 12 cylinders |
| Engine Type | in-line | V |
| Horse Power | 91 HP | 296 HP |
| Engine RPM | 4000 RPM | 5200 RPM |
| Torque | 204 Nm | 450 Nm |
| Torque RPM | 2200 RPM | 4100 RPM |
| Engine Compression Ratio | 7.1:1 | 8.8:1 |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4790 mm |
| Vehicle Width | 1680 mm | 1860 mm |
| Wheelbase Size | 2750 mm | 2690 mm |
