1951 Alvis TB 21 vs. 1989 Porsche 911
To start off, 1989 Porsche 911 is newer by 38 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 3,600 cc (6 cylinders), 1989 Porsche 911 is equipped with a bigger engine. In terms of performance, 1989 Porsche 911 (247 HP @ 6100 RPM) has 156 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1989 Porsche 911 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1989 Porsche 911 (317 Nm) has 113 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1989 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 | 1989 Porsche 911 | |
| Make | Alvis | Porsche |
| Model | TB 21 | 911 |
| Year Released | 1951 | 1989 |
| Engine Position | Front | Rear |
| Engine Size | 2993 cc | 3600 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Horse Power | 91 HP | 247 HP |
| Engine RPM | 4000 RPM | 6100 RPM |
| Torque | 204 Nm | 317 Nm |
| Engine Bore Size | 84 mm | 100 mm |
| Engine Stroke Size | 90 mm | 76.4 mm |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 4 seats |
| Vehicle Length | 4430 mm | 4260 mm |
| Vehicle Width | 1680 mm | 1660 mm |
| Wheelbase Size | 2750 mm | 2410 mm |
