1955 Alvis TC 21 vs. 2007 Porsche 911
To start off, 2007 Porsche 911 is newer by 52 year(s). Which means there will be less support and parts availability for 1955 Alvis TC 21. In addition, the cost of maintenance, including insurance, on 1955 Alvis TC 21 would be higher. At 3,600 cc (6 cylinders), 2007 Porsche 911 is equipped with a bigger engine. In terms of performance, 2007 Porsche 911 (473 HP @ 6000 RPM) has 368 more horse power than 1955 Alvis TC 21. (105 HP @ 4000 RPM) In normal driving conditions, 2007 Porsche 911 should accelerate faster than 1955 Alvis TC 21. With that said, vehicle weight also plays an important factor in acceleration. 2007 Porsche 911 weights approximately 140 kg more than 1955 Alvis TC 21. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Porsche 911 is four wheel drive (4WD), it will have significant more traction and grip than 1955 Alvis TC 21. In wet, icy, snow, or gravel driving conditions, 2007 Porsche 911 will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2007 Porsche 911 (620 Nm @ 1950 RPM) has 399 more torque (in Nm) than 1955 Alvis TC 21. (221 Nm @ 2500 RPM). This means 2007 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1955 Alvis TC 21.
Compare all specifications:
| 1955 Alvis TC 21 | 2007 Porsche 911 | |
| Make | Alvis | Porsche |
| Model | TC 21 | 911 |
| Year Released | 1955 | 2007 |
| Engine Position | Front | Rear |
| Engine Size | 2993 cc | 3600 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Valves per Cylinder | 2 valves | 4 valves |
| Horse Power | 105 HP | 473 HP |
| Engine RPM | 4000 RPM | 6000 RPM |
| Torque | 221 Nm | 620 Nm |
| Torque RPM | 2500 RPM | 1950 RPM |
| Engine Compression Ratio | 8.0:1 | 10.1:1 |
| Top Speed | 164 km/hour | 310 km/hour |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1450 kg | 1590 kg |
| Vehicle Length | 4810 mm | 4440 mm |
| Vehicle Width | 1680 mm | 1860 mm |
| Vehicle Height | 1590 mm | 1310 mm |
| Wheelbase Size | 2840 mm | 2360 mm |
