1951 Alvis TB 21 vs. 2011 BMW 550
To start off, 2011 BMW 550 is newer by 60 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 4,400 cc (8 cylinders), 2011 BMW 550 is equipped with a bigger engine. In terms of performance, 2011 BMW 550 (400 HP @ 5500 RPM) has 309 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2011 BMW 550 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2011 BMW 550 (609 Nm) has 405 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2011 BMW 550 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 | 2011 BMW 550 | |
| Make | Alvis | BMW |
| Model | TB 21 | 550 |
| Year Released | 1951 | 2011 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4400 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 400 HP |
| Engine RPM | 4000 RPM | 5500 RPM |
| Torque | 204 Nm | 609 Nm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4905 mm |
| Vehicle Width | 1680 mm | 1859 mm |
| Wheelbase Size | 2750 mm | 2969 mm |
