Many auto manufacturers are shifting toward smaller and more economical engines. Luckily GM Powertrain has an excellent inline-4 turbo engine called the Ecotec. This engine is used in the kappa cars — the Saturn Sky Redline, the Pontiac Solstice GXP, and the Opel GT.
It makes 260hp and 260 lb-ft of torque, so almost the same HP output as the FWD Northstar V8. The torque curve on this engine is basically flat from 2500-5200 rpm, so it is a stump puller.
Should this engine be used in Cadillacs? YES. Put this in the base CTS NOW as a replacement for the non-DI 3.6L or as an optional engine.