1951 Alvis TB 21 vs. 2011 GMC Envoy
To start off, 2011 GMC Envoy is newer by 60 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 4,161 cc (6 cylinders), 2011 GMC Envoy is equipped with a bigger engine. In terms of performance, 2011 GMC Envoy (285 HP @ 6000 RPM) has 194 more horse power than 1951 Alvis TB 21. (91 HP @ 4000 RPM) In normal driving conditions, 2011 GMC Envoy should accelerate faster than 1951 Alvis TB 21.
Let's talk about torque, 2011 GMC Envoy (374 Nm) has 170 more torque (in Nm) than 1951 Alvis TB 21. (204 Nm). This means 2011 GMC Envoy 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 | 2011 GMC Envoy | |
| Make | Alvis | GMC |
| Model | TB 21 | Envoy |
| Year Released | 1951 | 2011 |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 4161 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 91 HP | 285 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 204 Nm | 374 Nm |
| Engine Compression Ratio | 7.1:1 | 9.2:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Vehicle Length | 4430 mm | 4870 mm |
| Vehicle Width | 1680 mm | 1900 mm |
| Wheelbase Size | 2750 mm | 2880 mm |
