1951 Alvis TB 21 vs. 1986 BMW Z1
To start off, 1986 BMW Z1 is newer by 35 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, 1986 BMW Z1 (171 HP @ 5800 RPM) has 80 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 1986 BMW Z1 should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 1986 BMW Z1 (222 Nm) has 18 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 1986 BMW Z1 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 | 1986 BMW Z1 | |
| Make | Alvis | BMW |
| Model | TB 21 | Z1 |
| Year Released | 1951 | 1986 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2494 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 91 HP | 171 HP |
| Engine RPM | 4000 RPM | 5800 RPM |
| Torque | 204 Nm | 222 Nm |
| Engine Compression Ratio | 7.1:1 | 9.7:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Length | 4430 mm | 3960 mm |
| Vehicle Width | 1680 mm | 1810 mm |
| Wheelbase Size | 2750 mm | 2440 mm |
