1966 Alfa Romeo Spider vs. 1975 Porsche 911
To start off, 1975 Porsche 911 is newer by 9 year(s). Which means there will be less support and parts availability for 1966 Alfa Romeo Spider. In addition, the cost of maintenance, including insurance, on 1966 Alfa Romeo Spider would be higher. At 2,994 cc (6 cylinders), 1975 Porsche 911 is equipped with a bigger engine. In terms of performance, 1975 Porsche 911 (260 HP @ 5500 RPM) has 97 more horse power than 1966 Alfa Romeo Spider. (163 HP @ 5900 RPM) In normal driving conditions, 1975 Porsche 911 should accelerate faster than 1966 Alfa Romeo Spider. With that said, vehicle weight also plays an important factor in acceleration. 1966 Alfa Romeo Spider weights approximately 135 kg more than 1975 Porsche 911.
Let's talk about torque, 1975 Porsche 911 (343 Nm @ 4000 RPM) has 123 more torque (in Nm) than 1966 Alfa Romeo Spider. (220 Nm @ 4000 RPM). This means 1975 Porsche 911 will have an easier job in driving up hills or pulling heavy equipment than 1966 Alfa Romeo Spider.
Compare all specifications:
| 1966 Alfa Romeo Spider | 1975 Porsche 911 | |
| Make | Alfa Romeo | Porsche |
| Model | Spider | 911 |
| Year Released | 1966 | 1975 |
| Body Type | Roadster | Coupe |
| Engine Position | Front | Rear |
| Engine Size | 2582 cc | 2994 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | boxer |
| Valves per Cylinder | 2 valves | 2 valves |
| Horse Power | 163 HP | 260 HP |
| Engine RPM | 5900 RPM | 5500 RPM |
| Torque | 220 Nm | 343 Nm |
| Torque RPM | 4000 RPM | 4000 RPM |
| Engine Bore Size | 83 mm | 95.1 mm |
| Engine Stroke Size | 79.6 mm | 70.4 mm |
| Engine Compression Ratio | 9.0:1 | 6.5:1 |
| Number of Seats | 2 seats | 4 seats |
| Number of Doors | 2 doors | 2 doors |
| Vehicle Weight | 1330 kg | 1195 kg |
| Vehicle Length | 4510 mm | 4300 mm |
| Vehicle Width | 1610 mm | 1780 mm |
| Vehicle Height | 1390 mm | 1330 mm |
| Wheelbase Size | 2510 mm | 2270 mm |
| Fuel Tank Capacity | 46 L | 79 L |
