The TSX V6 is only available with the 5 - speed automatic transmission .
Instead , a 280 hp 3.5 - litre V6 became available in the 2010 Acura TSX .
The Acura TSX V6 is only available with the 5 - speed automatic transmission .
Instead , a 280 hp 3.5 - litre V6 became available in the 2010 Acura TSX .