Race driver and TV presenter Tiff Needell reviews the new generation 2014 Porsche 911 Targa 4S. Tiff tests the new 911 Targa on public roads. This means we'll have to wait a bit more before seeing it on the race track. The 2014 Porsche 911 Targa is powered by the 3.4-litre flat 6-cylinder engine that develops 350 hp. With this engine, the new 911 Targa (2014) can get from zero to 62 mph in 4.8 seconds.