1951 Alvis TB 21 vs. 1987 Porsche 911
To start off, 1987 Porsche 911 is newer by 36 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 3,164 cc (6 cylinders), 1987 Porsche 911 is equipped with a bigger engine. In terms of performance, 1987 Porsche 911 (228 HP @ 5900 RPM) has 137 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1987 Porsche 911 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1987 Porsche 911 (286 Nm) has 82 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1987 Porsche 911 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 | 1987 Porsche 911 | |
| Make | Alvis | Porsche |
| Model | TB 21 | 911 |
| Year Released | 1951 | 1987 |
| Engine Position | Front | Rear |
| Engine Size | 2993 cc | 3164 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 228 HP |
| Engine RPM | 4000 RPM | 5900 RPM |
| Torque | 204 Nm | 286 Nm |
| Engine Bore Size | 84 mm | 95 mm |
| Engine Stroke Size | 90 mm | 74.4 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4300 mm |
| Vehicle Width | 1680 mm | 1660 mm |
| Wheelbase Size | 2750 mm | 2270 mm |
