1951 Alvis TB 21 vs. 1978 BMW 520
To start off, 1978 BMW 520 is newer by 27 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 2,993 cc (6 cylinders), 1951 Alvis TB 21 is equipped with a bigger engine. In terms of performance, 1978 BMW 520 (135 HP @ 4000 RPM) has 44 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1978 BMW 520 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1978 BMW 520 (280 Nm) has 76 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1978 BMW 520 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 | 1978 BMW 520 | |
Make | Alvis | BMW |
Model | TB 21 | 520 |
Year Released | 1951 | 1978 |
Engine Position | Front | Front |
Engine Size | 2993 cc | 1951 cc |
Engine Cylinders | 6 cylinders | 4 cylinders |
Engine Type | in-line | in-line |
Valves per Cylinder | 2 valves | 4 valves |
Horse Power | 91 HP | 135 HP |
Engine RPM | 4000 RPM | 4000 RPM |
Torque | 204 Nm | 280 Nm |
Engine Bore Size | 84 mm | 84 mm |
Engine Stroke Size | 90 mm | 88 mm |
Engine Compression Ratio | 7.1:1 | 19.0:1 |
Number of Seats | 5 seats | 5 seats |
Vehicle Length | 4430 mm | 4810 mm |
Vehicle Width | 1680 mm | 1810 mm |
Wheelbase Size | 2750 mm | 2770 mm |