Earlier this year Nissan began production in Sunderland of the Leaf, the first electric car to be mass-produced in the UK.  But 40 years ago, about 100 electric cars were built on the Isle of Wight to a design that was years ahead of its time. 

The Enfield 8000 was a prototype electric vehicle which emerged out of a competition run by the United Kingdom Electricity Council in 1966. 

Enfield Automotive beat rival bidders like Ford for the contract and made more than 100 cars at its works on the Isle of Wight. 

With a top speed of 48mph (77km/h) and a range of up to 56 miles (90km), the car was aimed at low mileage urban users, and was expected to supply a much needed boost to Britain's export push. 

The vehicle was designed round a chassis of square cross-section steel tubing with panels made of lightweight aluminium. 

Find out more Listen to The Enfield Thunderbolt on BBC Radio 4 on Saturday 30 November at 10:30 GMT Or catch up on BBC iPlayer

The car's power came from eight 6V battery monoblocks, and an onboard charger meant it could simply be connected to the domestic mains through a socket in the back. 

"The principle was much the same as a modern electric car," according to Radio 4 presenter Peter Curran, who has bought and restored an Enfield 8000. 

He says: "It was small, square and squat, but somehow futuristic with a beautiful curving windscreen.  It had a cheekiness and came in a variety of colours - red, orange and blue.  To the casual observer it looked a bit like a supersized Spangle." 

Image caption Peter Curran with his Enfield 8000

The car performed well and was favourably reviewed by the motoring press at the time.  Its acceleration was considered impressive (0-30 mph in 12.5 seconds), it passed the Department of Transport's crash tests with flying colours and when placed in a wind tunnel showed it had a better drag coefficient than a Porsche. 

Media playback is unsupported on your device Media caption Valerie Singleton and John Noakes have a go at driving the Enfield 8000. 

In November 1969, the Enfield 8000 was shown off at the first ever international symposium on electric vehicles, held in Phoenix, Arizona, where it caught the eye of Ronald Reagan, then Governor of California. 

We used to get irate phone calls from gas station owners across the States yelling 'You're putting me out of business!'  Sir John Samuel

"We took a truck across America with two Enfields on the back," says Sir John Samuel, who was leading the delegation. " Some people just looked at them and laughed, but Ronnie Reagan was astounded, and he said, 'Why can't we do this here?'" 

Governor Reagan offered to find a factory site in California, promising healthy subsidies and guaranteed orders.  He even suggested giving the cars to all home-buyers on the island of Santa Catalina off the California coast, where the use of petrol-driven vehicles was - and still is - heavily restricted. 

But Enfield Automotive's owner John Goulandris, who was from a wealthy Greek shipping family, turned down Reagan's offer and chose to continue production in Cowes on the Isle of Wight. 

Some have suggested Goulandris rejected Reagan's offer because he was under pressure from the oil industry and had significant shipping business with them. 

Samuel, who went on to work on a number of other groundbreaking electric cars in the US, sensed the antagonism towards electric vehicles from those in the oil industry at the time. 

Image caption Electricity Board members are given an early demonstration of the Enfield 8000

"We used to get irate phone calls from gas station owners across the States yelling 'You're putting me out of business!'"  he recalls. 

In 1973 Goulandris switched production to the Greek island of Syros, although the parts were sent back to the UK to be assembled. 

But sales were sluggish. 

"Along with the modest range, the main deterrent was really the price," says enthusiast Peter Williams. " It was being offered at £2,600.  Back then, for that sort of money, you could buy two Minis." 

In May 1976, production stopped altogether. 

But many of today's electric cars - including those being manufactured by Renault, Nissan and BMW - owe a considerable debt to the Enfield 8000, which showed the world that a small urban car powered by rechargeable batteries was a real possibility. 

Image caption The car's power comes from battery monoblocks... Image caption ...and an onboard charger allows the car to be connected to the mains previous slide next slide

After being used as promotional vehicles by the electricity boards for many years, most of the Enfield 8000s were scrapped in the 1980s, but a handful remain in the hands of museums and collectors. 

As interest in electric cars increases and good examples get scarcer, the price of surviving Enfield cars is sure to increase. 

More from the Magazine Nissan has begun production of the first UK-built electric car, the Leaf, at its plant in Sunderland.  The company believes that after a slow start, the time has finally come for the battery operated electric car.... nonetheless some scientists are questioning their green credentials.  How 'green' are electric cars? ( 11 April)

A number of owners are planning to adapt and refine the 70s technology, replacing the heavy original lead acid batteries with lightweight lithium ones, and dramatically increasing the range of the car. 

TV presenter Jonny Smith has equipped his 1974 Enfield with a high power battery enabling it to compete on the Hot Rod track. 

"I want something that shows what the little Enfield was capable of, and I really believe it can be a supercar slayer," he says. 

Enthusiasts like Peter Williams believe it is time for the Enfield to take its rightful place in British motoring history alongside cars like the MG, Mini and the Jaguar E-Type. 

Its pioneering role was recently recognised by the organisers of the London-Brighton veteran car run, who allowed a 1973 Enfield 8000 owned by Clive Williams from Manchester to accompany much older cars on the annual rally. 

The car was driven in the run by Peter Curran, who says: "It has impressive acceleration, and driving around central London on a quiet Sunday morning was a real joy. 

"The final coast downhill to the finish line at Brighton was incredibly exhilarating.  But in a strange metaphor for the story of its production, the car finally ran out of charge less than a mile from home." 

Listen to The Enfield Thunderbolt on BBC Radio 4 on Saturday 30 November at 10:30 GMT or catch up on BBC iPlayer

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