The numbers don ' t do justice to the effervescent nature of the new 1-4. the throttle response is the last word in mmediate, and this is one of those rare 4-cyls. That continually hits the fuel cutoff long before noise and vibration suggest a gear change is in order. Twin balance shafts certainly help in that regard The 2L mill has a variable-length intake manifold and a superb BorgWarner Turbo Systems variable-turbine turbocharger that, when combined with FSI, all but eliminates turbo lag just about the last remaining drawback of turbocharging The 2L I-4 is claimed to be the world's first automotive engine to combine DIG technology and turbocharging. If Audi's brilliant new 4-cyl. engine is typical of what happens when direct injection and turbocharging get together, we expect to see much of the auto industry follow in Audis innovative footstepsThe numbers don't do justice to the effervescent nature of the new I-4. The throttle response is the last word in immediate, and this is one of those rare 4-cyls. That continually hits the fuel cutoff long before noise and vibration suggest a gear change is in order. Twin balance shafts certainly help in that regard. The 2L mill has a variable-length intake manifold and a superb BorgWarner Turbo Systems variable-turbine turbocharger that, when combined with FSI, all but eliminates turbo lag, just about the last remaining drawback of turbocharging. The 2L I-4 is claimed to be the world's first automotive engine to combine DIG technology and turbocharging. If Audi's brilliant new 4-cyl. engine is typical of what happens when direct injection and turbocharging get together, we expect to see much of the auto industry follow in Audi's innovative footsteps