I thought I was reading it wrong until your post, Golfbuddy..the most disappointing car, not the worst?
Most disappointing was an 07 reg Astra (what they on now? Astra H?). Had an S reg 2.0 Di Estate that was unbelievable - comfy, handled well, economical, never let me down. The new Astra? Uncomfortable, terrible ride, crap on fuel and lousy at accelerating. Shattered my illusion of "progress"..
Yes, i'm slamming a Vx...at least with a 1.0 Corsa, you knew it would't accelerate, but I liked the noise from the 3-pot...
Most surprising one was a Cav 2.0 CDi (8v) - the works hack. 250k on the clock. Still posted my fasted time ever from home to Ellesmere Port, stuck to the road like glue and still returned 39mpg...god knows how! 3rd gear in that was a revelation - 30 to 90-odd mph - great for slip roads! Best start a new thread...