Aston Martin DB9

For mini-compact cars, the Aston Martin DB9 has a 5.9 liter, 12-cylinder engine and gets an average 15 miles to the gallon. The Aston Martin has a manufacturer's suggested retail price starting at $187,000.

Maserati GranTurismo Convertible

For subcompact cars, the Maserati GranTurismo Convertible (shown above) has a 4.7 liter, 8-cylinder engine and gets an average 15 miles to the gallon. The GranTurismo Convertible has a manufacturer's suggested retail price between $145,740-$182,009.

Mercedes-Benz C63 AMG Coupe

Also in subcompact car category, the Mercedes-Benz C63 AMG Coupe has a 6.2 liter, 8-cylinder engine and gets an average 15 miles to the gallon. The C63 AMG Coupe has a manufacturer's suggested retail price of $62,950.

Bentley Continental GT Convertible

The Bentley Continental GT Convertible, the final subcompact car, has a 6.0 liter, 12-cylinder engine and gets an average 15 miles to the gallon. The vehicle has a manufacturer's suggested retail price between $206,300-$250,100.

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