Horsepower of every type is on display at the Bentley Scottsdale Polo Championships: Horses & Horsepower. This year, Earnhardt Hyundai North Scottsdale will have its autos on display proving that you can have horsepower AND fuel economy. In fact, Earnhardt Hyundai North Scottsdale is the number one Equus dealer in the nation. The Earnhardt family began selling cars in 1951.