The 2010 Scion tC is available as a 2-door, 5-seat coupe. Starting at $17,900, the 2010 Scion tC Base (A4) is powered by a 2.4L , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway. The top of the line 2010SciontCRelease Series 6.0 (A4) , priced at $ 19,420 , is powered by a 2.4L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 29-mpg on the highway.