Porsche 928 1977–1986 car dimensions: 4447 mm long, 1836 mm wide and 1313 mm high. Unladen weight is 1,450 kg. Braked towing is 1,600 kg.
The cabin has air conditioning as standard equipment, with automatic climate control fitted on S models. Cruise control comes standard. Power windows, central locking, a height-adjustable steering wheel and folding rear seats are included. Power seats and leather trim are options on base models and standard on S grades. No electronic driver aids such as cameras or sensors appear in the equipment lists.
Boot space measures 200 litres with the rear seats in place. Folding the rear seats doubles the capacity to 400 litres for larger loads.
Braked towing capacity is listed at 1600 kg with unbraked at 750 kg. Payload capacity sits around 360 kg depending on exact specification and equipment. The car is a grand tourer with optional upgraded suspension packages available on some models, but it is not set up for heavy commercial work.
The cabin delivers a luxurious grand tourer feel with supportive bolstered front seats offering ample leg room and electric adjustment on higher grades. Air conditioning is standard, cooling the interior and glovebox. Power windows, cruise control, central locking, and a height-adjustable steering wheel that moves the instrument cluster ensure good visibility and ease. Tinted windows and a four-speaker radio/cassette are fitted. Rear individual seats fold flat for luggage but suit only children or short adult trips due to the wide tunnel and limited space.
Petrol V8 fuel consumption around 13-16 L/100 km combined or 14-17 mpg.
Original oil and filter change every 15,000 miles.
Timing belt replacement every 60,000 miles.
Ventilated disc brakes standard all round.
ABS optional from 1984 on S models, standard from 1986.
Galvanised body with multi-year anti-corrosion warranty.
The 928 runs on petrol with its front-mounted V8. Period figures show combined consumption near 13.2 L/100 km for early cars. Later EPA ratings list around 15 mpg city and 21-22 mpg highway for 1986 models. Real-world use varies with driving style and conditions.
Factory service calls for oil and filter changes every 15,000 miles. The timing belt needs replacement every 60,000 miles, with inspections in between. many owners do it sooner. Air and fuel filters follow similar intervals. Brake fluid and power steering fluid need periodic checks and changes.
Safety kit centres on four-wheel ventilated disc brakes with servo assist and the Weissach axle for stable handling that reduces lift-off oversteer. Power steering is standard. No airbags appear in this generation. ABS starts as an option on the S from 1984 and becomes standard by 1986. The hot-dip galvanised body resists corrosion well under the multi-year warranty.
Keeping a 928 means sticking to service history, especially timing belt, water pump and fluid changes. Engines last beyond 150,000 miles when cared for. Specialists handle most issues at reasonable cost relative to the car. Rust is uncommon thanks to galvanising and aluminium panels, though drains and subframes need watching. Regular use and checks keep it reliable as a daily grand tourer.
Length 4447 mm, Width 1836 mm, Height 1313 mm, Wheelbase 2500 mm (928 1977–1986)
Sources: manufacturer data, Porsche Classic archived page, auto-data.net/carfolio.com.