1979 Ford Mustang III Dimensions, Size & Specs

The curb weight of the Mustang III varies between 1250 kg (2,756 lbs) and 1380 kg (3,042 lbs), depending on the specific model and options equipped. This relatively light weight contributed to improved fuel economy and driving dynamics. Compared to the bulkier earlier Mustangs, the Mustang III's lighter frame made it more agile and easier to maneuver.

The Mustang III offers a substantial luggage capacity of 850 liters (approximately 30 cubic feet), which is quite generous for a coupe. This ample cargo space enhances the car's practicality, allowing for convenient storage of luggage and other items, making it suitable for daily use and road trips despite its sporty performance orientation.

The Mustang III typically runs on two tire sizes: 195/75 R14 and 225/55 ZR16. The 195/75 R14 tires offer a comfortable ride with adequate grip, favoring smooth driving, while the wider 225/55 ZR16 tires cater to enhanced sportiness and handling by providing better road contact and improved cornering capabilities.

Yes, the Mustang III can comfortably fit into a standard residential garage. With a length of 4560 mm (179.5 inches) and a width of 1735 mm (68.3 inches), it fits within the typical garage dimensions which usually measure around 6 meters (19.7 feet) in length and 3 meters (9.8 feet) in width. Its compact size makes maneuvering in indoor parking relatively easy compared to larger muscle cars.

The Mustang III shows some dimensional evolution compared to its predecessor, the Mustang II. While both cars emphasize compactness and efficiency, the Mustang III is slightly longer and wider, contributing to improved stability and interior space. This generation focused more heavily on combining sporty design with greater functionality, typical of late 70s and 80s automotive trends.

When compared to competitors like the Chevrolet Camaro and Pontiac Firebird of the same era, the Mustang III is generally smaller and lighter. Its length of 4560 mm (179.5 inches) and weight ranging from 1250 to 1380 kg (2,756 to 3,042 lbs) made it more fuel-efficient and easier to handle, though sometimes at the expense of raw power. The Mustang III struck a balance that appealed to buyers seeking a sporty yet practical coupe.

The Mustang III’s compact exterior dimensions translate to a cozier interior, suitable primarily for up to four occupants. While its lower height of 1320 mm (51.96 inches) results in a sportier low seating position, the width of 1735 mm (68.3 inches) ensures decent shoulder room for front passengers. Rear seats provide adequate space for shorter trips or smaller passengers, with practicality amplified by a large 850-liter (30 cubic feet) trunk.

The Mustang III was designed during a time when fuel efficiency and emissions standards were becoming increasingly important due to the energy crises of the 1970s. Its relatively compact size, reduced weight (1250–1380 kg or 2,756–3,042 lbs), and aerodynamic form were deliberate moves to improve fuel economy compared to earlier, heavier muscle cars. This strategy helped the Mustang remain relevant without sacrificing its sporty appeal.

The low height of 1320 mm (51.96 inches) contributes to the Mustang III’s sleek, aerodynamic silhouette, enhancing both aesthetics and performance. A lower center of gravity improves handling and stability around corners, offering a sportier driving experience. Additionally, this height gives the Mustang III a distinctive profile on the road, setting it apart from taller and bulkier vehicles of the era.