1975 MG MGB

Mk IV (Black Bumper) Roadster 1.8 L

Vehicle values by condition

Fair
Condition 4
£3,400
#4 cars are daily drivers, with flaws visible to the naked eye. The chrome might have pitting or scratches, the windshield might be chipped.
Good
Condition 3
£7,800
#3 cars could possess some, but not all of the issues of a #4 car, but they will be balanced by other factors such as a fresh paint job or a new, correct interior.
Excellent
Condition 2
£11,700
#2 cars could win a local or regional show. They can be former #1 cars that have been driven or have aged. Seasoned observers will have to look closely for flaws.
Concours
Condition 1
£15,800
#1 vehicles are the best in the world. The visual image is of the best car, unmodified, in the right colours, driving onto the lawn at the finest concours.
Insurance premium for a
1975 MG MGB Mk IV (Black Bumper) Roadster 1798
valued at £7,800
£131.31 / year*

History of the 1974 - 1980 MG MGB

1974 - 1980 MG MGB
1974 - 1980 MG MGB

The MGB is a classic British roadster that was originally introduced in 1962. By 1967, changes were incorporated that lead to the designation of the MGB Mk II (officially the 1968 model year). This model continued in production until August 1971, and was then superseded by the MGB roadster Mk III in October 1971, from chassis number 258001.

Like the Mk I and Mk II MBG, the Mk III is a two-door roadster powered by a front-mounted, rear-wheel drive 1798cc B Series engine. The Mark III benefitted from a revised interior, with centre console now utilising rocker switches and with two air vents in the middle. An arm rest was added between the front seats.

In October 1972, from chassis number 294251, the MGB Mk III roadster was fitted with a black plastic cross-mesh grille with a wide chrome surround (now incorporating the MG badge) and vertical centre chrome bar. The steering wheel was redesigned, and padded arm rests replaced the door pull straps.

In October 1974, from chassis number 360301, the model was given a visual redesign to meet US impact regulations. Large black urethane bumpers were added on front and rear with front indicators incorporated into the ‘rubber bumper’. The nose was redesigned, the ride height of the car increased, and overdrive became standard.

In August 1976, from chassis number 411352, the fascia was covered in grey crackle (rather than black), the steering wheel was redesigned to include an ‘H’ pattern (replacing three spokes), the overdrive switch moved to the gear lever from the column stalk, full carpets were included, the fabric upholstery gained stripes, and suspension and steering was revised. In August 1977, door mirrors were repositioned.

Today the MGB roadster remains one of the UK’s favourite classic cars. It is very easy to maintain, very practical, and has superb parts availability and interchangeability across model types. This meaning the cars are easy to ‘upgrade’ should the owner so wish. The MGB roadster is also still abundant, meaning the buyer had a great deal of choice.

Early ‘Chrome Bumper’ models tend to be more collectible than later ‘rubber bumper’ models, although kits to retro-fit chrome trim are available. Alternatives from the era include the Ford Capri, the Reliant Scimitar, and the MGB’s bigger brother, the MGC.

All 1975 MG MGB body types

Year Make Model Submodel Body Type Engine size Average value
1974 MG MGB GT V8 (Black Bumper) Coupe 3.5 L £ 7,300 11,800 19,300 28,300
1974 MG MGB Mk IV (Black Bumper) Roadster 1.8 L £ 3,400 7,800 11,700 15,800
1975 MG MGB GT Mk IV (Black Bumper) Coupe 1.8 L £ 2,500 5,100 8,600 15,200
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