1973 Austin Allegro vs. 2007 GMC Sierra
To start off, 2007 GMC Sierra is newer by 34 year(s). Which means there will be less support and parts availability for 1973 Austin Allegro. In addition, the cost of maintenance, including insurance, on 1973 Austin Allegro would be higher. At 5,999 cc (8 cylinders), 2007 GMC Sierra is equipped with a bigger engine. In terms of performance, 2007 GMC Sierra (312 HP @ 4400 RPM) has 254 more horse power than 1973 Austin Allegro. (58 HP @ 5300 RPM) In normal driving conditions, 2007 GMC Sierra should accelerate faster than 1973 Austin Allegro. With that said, vehicle weight also plays an important factor in acceleration. 2007 GMC Sierra weights approximately 1970 kg more than 1973 Austin Allegro. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 GMC Sierra is four wheel drive (4WD), it will have significant more traction and grip than 1973 Austin Allegro. In wet, icy, snow, or gravel driving conditions, 2007 GMC Sierra 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 GMC Sierra (506 Nm @ 4400 RPM) has 413 more torque (in Nm) than 1973 Austin Allegro. (93 Nm @ 3000 RPM). This means 2007 GMC Sierra will have an easier job in driving up hills or pulling heavy equipment than 1973 Austin Allegro. 2007 GMC Sierra has automatic transmission and 1973 Austin Allegro has manual transmission. 1973 Austin Allegro will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 GMC Sierra will be easier to drive especially in heavy traffic.
Compare all specifications:
| 1973 Austin Allegro | 2007 GMC Sierra | |
| Make | Austin | GMC |
| Model | Allegro | Sierra |
| Year Released | 1973 | 2007 |
| Engine Position | Front | Front |
| Engine Size | 1275 cc | 5999 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Horse Power | 58 HP | 312 HP |
| Engine RPM | 5300 RPM | 4400 RPM |
| Torque | 93 Nm | 506 Nm |
| Torque RPM | 3000 RPM | 4400 RPM |
| Engine Bore Size | 70.6 mm | 102 mm |
| Engine Stroke Size | 81.3 mm | 92 mm |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 6 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 820 kg | 2790 kg |
| Vehicle Length | 3860 mm | 6340 mm |
| Vehicle Width | 1620 mm | 2440 mm |
| Vehicle Height | 1400 mm | 1940 mm |
| Wheelbase Size | 2440 mm | 4010 mm |
| Fuel Tank Capacity | 47 L | 129 L |
