1951 Alvis TB 21 vs. 1958 BMW 503
To start off, 1958 BMW 503 is newer by 7 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 3,168 cc (8 cylinders), 1958 BMW 503 is equipped with a bigger engine. In terms of performance, 1958 BMW 503 (138 HP @ 4800 RPM) has 47 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1958 BMW 503 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1958 BMW 503 (222 Nm) has 18 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1958 BMW 503 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 | 1958 BMW 503 | |
| Make | Alvis | BMW |
| Model | TB 21 | 503 |
| Year Released | 1951 | 1958 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 3168 cc |
| Engine Cylinders | 6 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 138 HP |
| Engine RPM | 4000 RPM | 4800 RPM |
| Torque | 204 Nm | 222 Nm |
| Engine Bore Size | 84 mm | 82 mm |
| Engine Stroke Size | 90 mm | 75 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4760 mm |
| Vehicle Width | 1680 mm | 1710 mm |
| Wheelbase Size | 2750 mm | 2840 mm |
