The GL and GLS models are available with a 2.0-liter 4-cylinder engine or Volkswagen's excellent 1.9-liter TDI diesel. The GLX comes with Volkswagen's VR6 narrow-angle V6, which is also available for the GLS.http://www.internetautoguide.com/reviews/45-int/compact-cars/volkswagen/jetta/2000/index.html