The stunning one-off classic Corvette up for auction is forecast to fetch a staggering £2.5million

A ONE TIME Corvette is up for auction and is expected to fetch an incredible amount of money.

The 1969 Chevrolet Corvette Stingray ZL-1 Convertible will be included in the auction RM Sotheby’s in Arizona.

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Two Stingray ZL-1s were made in 1969, but this is the only one with a convertible top.

Its rarity means experts reckon it could fetch up to $3 million once the gavel falls.

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Chevrolet took a standard Corvette Stingray and installed a street-legal version of a 7.0-liter all-aluminum V8 racing engine.

That brought the power to 560 hp – a massive number by today’s standards, let alone in 1969.

The brakes and suspension were upgraded and the car got rid of the radio, heater, air conditioning, power windows and power steering to save weight.

The first owner blew up the car’s original engine, which means it installed a different one.

However, it is the same as the original engine down to the code, which ensures its value.

The Corvette belongs to its second owner who is now putting it up for sale.

This is the first time a ZL-1 has been offered for sale in 30 years, and the first time ever a convertible.

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