but the DMC engineering staff was busy with other projects, so DMC decided to go outside to develop a turbocharged version. DMC entered into a contract with Legend Industries, based in Hauppauge, New York, a firm having previous success with turbocharging Fiat Spiders for Fiat USA. DMC wanted to increase power without sacrificing fuel efficiency. DMC wanted a wide power band and did not want a surge of power similar to the Porsche 930 Turbo. Legend used twin IHI RHB52 turbos along with twin intercoolers. The results were an engine capable of accelerating smoothly in fifth gear from 1,500 rpm to full turbo boost at 2,500 rpm, reaching at 6,500 rpm. Legend converted four DeLoreans (two twin-turbo cars (VIN 502 and VIN 530) and two single-turbo cars (VIN 528 and VIN 558)). In a test run at Bridgehampton Raceway in 1981, the twin-turbo DeLorean was quicker than a Ferrari 308 and a Porsche 928. The twin-turbo DeLorean tested 0–60 mph in 5.8 seconds and the in 14.7 seconds. John DeLorean was so impressed with the engine, he committed to ordering 5,000 engines from Legend Industries. DMC planned to offer a turbocharged engine as a $7,500 option in 1984. Before any of the 5,000 cars could be put into production, DMC had declared bankruptcy, which drove Legend Industries, as well as other suppliers, into bankruptcy. Gold-plated For Christmas 1980, a DeLorean/American Express promotion planned to sell 100 24K-gold-plated DeLoreans for US$85,000 each to its gold-card members, but only two were sold. The first gold-plated American Express DeLorean was purchased by Sherwood Marshall, an entrepreneur and former Royal Canadian Naval Officer. This car, VIN 4300, is equipped with a manual transmission and a saddle-brown interior. Marshall donated his DeLorean to the William F. Harrah Foundation/National Automobile Museum in Reno, Nevada. The second gold-plated DeLorean was purchased by Roger Mize, president of Snyder National Bank in Snyder, Texas. This car, VIN 4301, equipped with an automatic transmission and black interior, sat in the bank lobby for over 20 years before being loaned to the Petersen Automotive Museum in Los Angeles. A third gold-plated car was assembled with spare parts that were required by American Express in case one of the other two that were built was damaged. All necessary gold-plated parts were on hand, with the exception of one door that was sourced later. The car was first acquired by the winner of