1951 Alvis TB 21 vs. 2008 Porsche Cayman
To start off, 2008 Porsche Cayman is newer by 57 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 3,386 cc (6 cylinders), 2008 Porsche Cayman is equipped with a bigger engine. In terms of performance, 2008 Porsche Cayman (291 HP @ 6250 RPM) has 200 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2008 Porsche Cayman should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2008 Porsche Cayman (340 Nm) has 136 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2008 Porsche Cayman 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 | 2008 Porsche Cayman | |
| Make | Alvis | Porsche |
| Model | TB 21 | Cayman |
| Year Released | 1951 | 2008 |
| Engine Position | Front | Middle |
| Engine Size | 2993 cc | 3386 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 291 HP |
| Engine RPM | 4000 RPM | 6250 RPM |
| Torque | 204 Nm | 340 Nm |
| Engine Bore Size | 84 mm | 96 mm |
| Engine Stroke Size | 90 mm | 78 mm |
| Engine Compression Ratio | 7.1:1 | 11.1:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4350 mm |
| Vehicle Width | 1680 mm | 1810 mm |
| Wheelbase Size | 2750 mm | 2420 mm |
