The 2010 Volvo C70 is available as a 2-door, 4-seat convertible. Starting at $40,000, the 2010 Volvo C70 Base is powered by a 2.5L , 5 -cylinder engine mated to a manual transmission that returns an EPA estimated 20-mpg in the city and 28-mpg on the highway. The top of the line 2010VolvoC70Fleet , priced at $ 40,000 , is powered by a 2.5L , 5 - cylinder engine mated to a manual transmission that returns an EPA estimated 20-mpg in the city and 28-mpg on the highway.