2009 Alpina B7 vs. 1952 Alvis TB 21
To start off, 2009 Alpina B7 is newer by 57 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 4,397 cc (8 cylinders), 2009 Alpina B7 is equipped with a bigger engine. In terms of performance, 2009 Alpina B7 (493 HP @ 5500 RPM) has 402 more horse power than 1952 Alvis TB 21. (91 HP @ 4000 RPM). In normal driving conditions, 2009 Alpina B7 should accelerate faster than 1952 Alvis TB 21.
Let's talk about torque, 2009 Alpina B7 (700 Nm @ 4250 RPM) has 496 more torque (in Nm) than 1952 Alvis TB 21. (204 Nm @ 2200 RPM). This means 2009 Alpina B7 will have an easier job in driving up hills or pulling heavy equipment than 1952 Alvis TB 21.
Compare all specifications:
| 2009 Alpina B7 | 1952 Alvis TB 21 | |
| Make | Alpina | Alvis |
| Model | B7 | TB 21 |
| Year Released | 2009 | 1952 |
| Engine Position | Front | Front |
| Engine Size | 4397 cc | 2992 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 493 HP | 91 HP |
| Engine RPM | 5500 RPM | 4000 RPM |
| Torque | 700 Nm | 204 Nm |
| Torque RPM | 4250 RPM | 2200 RPM |
| Engine Bore Size | 92 mm | 84 mm |
| Engine Stroke Size | 82.8 mm | 90 mm |
| Engine Compression Ratio | 9.0:1 | 7.1:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 5180 mm | 4430 mm |
| Vehicle Width | 1910 mm | 1680 mm |
| Wheelbase Size | 3140 mm | 2750 mm |
