This "'list of car makes " tries to show every make or marque of car ever used; some are manufacturing companies in their own right that also use their company name as a model name, and others are subsidiary companies, divisions, or products of badge engineering.
The Concept Centaur GT was a kit car first built by Concept Cars Ltd of Middleton, Leicestershire, in 1973 and marketed from 1974 to 1977.
 The design was very much influenced by the Probe 15 from Adams Probe Motor.
 The car is famous for possibly being the lowest car ever made being only 94 cm (37 in) high.
 It was based on the Hillman Imp mechanicals and the body was a GRP-and-plywood monocoque with box section and steel tube reinforcement.
 The number of models produced is disputed, both 26 and 52 cars have been quoted.
The Peel P50 is a three-wheeled microcar originally manufactured from 1962 to 1965 by the Peel Engineering Company on the Isle of Man.
 It was listed in the 2010 Guinness World Records as the smallest production car ever made.
 It had no reverse gear, but a handle at the rear allows the very lightweight car to be physically manoeuvred when required.
The Citroën Type A was produced from June 1919 to December 1921 in Paris, France.
 It was the very first Citroën car ever made.
The DeLorean time machine is a fictional automobile-based time travel device featured in the "Back to the Future" franchise.
 In the feature film series, Dr. Emmett Brown builds a time machine based on a DeLorean DMC-12 car, to gain insights into history and the future.
 Instead, he ends up using it to travel over 130 years of Hill Valley history (from 1885 to 2015) with Marty McFly to change the past for the better and to undo the negative effects of time travel.
 One of the cars used in filming is on display at Universal Studios Hollywood.
The DeLorean Motor Company (DMC) is an American automobile manufacturer originally formed by automobile industry executive John DeLorean in 1975.
 It is remembered for the one model it produced — the distinctive stainless steel DeLorean DMC-12 sports car featuring gull-wing doors—and for its brief and turbulent history, ending in receivership and bankruptcy in 1982.
 Near the end, in a desperate attempt to raise the funds his company needed to survive, John DeLorean was filmed appearing to accept money to take part in drug trafficking, but was subsequently acquitted of charges brought against him on the basis of entrapment.
The 1951 Hoffmann is a three-wheeled car created by Michael Hoffmann.
 It is considered by some to be the worst car ever made, owing to its pervasive bizarre design decisions.
The DeLorean DMC-12 (commonly referred to simply as "the DeLorean," as it was the only model ever produced by the company) is a sports car manufactured by John DeLorean's DeLorean Motor Company for the American market from 1981–83.
 The car features gull-wing doors and an innovative fiberglass body structure with a steel backbone chassis, along with external brushed stainless steel body panels.
 It became widely known and iconic for its appearance, and a modified DMC-12 was immortalized as the DeLorean time machine in the "Back to the Future" media franchise.
The Zastava 750 (Застава 750) was a supermini made by the Serbian car maker Zavod Crvena Zastava in Kragujevac.
 It was a version of the Fiat 600 made under licence from 1965, it was longer in length than the Fiat version.
 The Zastava 750 has a 767 cc engine, which produces 25 PS .
 The more powerful 750 SE has 30 PS at 5400 rpm and torque is 38 lbft at 3600 rpm.
 It is the smallest car ever made by Zastava.
 Later on during production, in 1980, the Zastava 850 was introduced.
 It is nearly identical to the Zastava 750 but the engine had a larger capacity.
 The Zastava 850 is harder to find than the 750 model but both are still widely available in former Yugoslavia.
The Serpollet Tricycle/Peugeot Type 1 is a small steam tricycle, produced by Peugeot in 1886.
 It is the first Peugeot car ever made.

Question: The DeLorean DMC-12 was the only model of car ever made by the company formed in what year?
Answer: 1975