1981 GMC Suburban vs. 1971 AC 428
To start off, 1981 GMC Suburban is newer by 10 year(s). Which means there will be less support and parts availability for 1971 AC 428. In addition, the cost of maintenance, including insurance, on 1971 AC 428 would be higher. At 7,003 cc (8 cylinders), 1971 AC 428 is equipped with a bigger engine. In terms of performance, 1971 AC 428 (298 HP @ 4600 RPM) has 169 more horse power than 1981 GMC Suburban. (129 HP @ 3600 RPM) In normal driving conditions, 1971 AC 428 should accelerate faster than 1981 GMC Suburban. With that said, vehicle weight also plays an important factor in acceleration. 1981 GMC Suburban weights approximately 965 kg more than 1971 AC 428.
Because 1981 GMC Suburban is four wheel drive (4WD), it will have significant more traction and grip than 1971 AC 428. In wet, icy, snow, or gravel driving conditions, 1981 GMC Suburban 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, 1971 AC 428 (639 Nm @ 2800 RPM) has 313 more torque (in Nm) than 1981 GMC Suburban. (326 Nm @ 2000 RPM). This means 1971 AC 428 will have an easier job in driving up hills or pulling heavy equipment than 1981 GMC Suburban.
Compare all specifications:
| 1981 GMC Suburban | 1971 AC 428 | |
| Make | GMC | AC |
| Model | Suburban | 428 |
| Year Released | 1981 | 1971 |
| Engine Position | Front | Front |
| Engine Size | 6210 cc | 7003 cc |
| Engine Cylinders | 8 cylinders | 8 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 129 HP | 298 HP |
| Engine RPM | 3600 RPM | 4600 RPM |
| Torque | 326 Nm | 639 Nm |
| Torque RPM | 2000 RPM | 2800 RPM |
| Fuel Type | Diesel | Gasoline |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Vehicle Weight | 2395 kg | 1430 kg |
| Vehicle Length | 5480 mm | 4430 mm |
| Vehicle Width | 1950 mm | 1710 mm |
| Vehicle Height | 1800 mm | 1310 mm |
| Wheelbase Size | 3300 mm | 2450 mm |
