I have a Vectra 2.0 DTi, that I use for work, and it was given to me as a fleet vehicle.
I am quite impressed with it, it is comfortable, my only gripe is that the fuel consumption for a Diesel is not great. My Vectra drinks like Charlotte Church! On a full tank from London to Stevenage and back, you're guaranteed to use over a quarter!
The Engine is not as refined as Toyota's D4-D unit, the other day I was passing a group of workmen, and they were worried and checking to see if the exhaust had fallen off their JCB. I reassured them that it was just my Vectra.
The performance is not bad, 0-40 is good, I've had many a Mondeo TDCi from the lights, though 50-70 can be torturous. You have to slam it into 3rd and bury the gas! The car looks smart, so much so, Toyota virtually copied it for the new Avensis. There is a new Vectra coming out at the end of the year, so I hope I will get that one as a next company car (pending probation period and unpredictable Line manger).
The engine range has been improved since my car's 2002 debut, and the new 150PS CDTi unit is great, with 6 speed gearbox! I would like Vauxhall to throw in GPS as standard (it is on many Toyota cars of that trim level). Cruise Control is great, if you are on a road where you dont have to stop and start all the time (M25, M1, M6), and she's good to 125 MPH. One Telford policeman got his 3.2V6 up to 159 MPH (see national papers!).
Still, going to Vauxhall Dealers is a game of Russian Roulette in itself. They range from downright crap (Currie Motors, Stamford Hill, PNG Waltham Cross), to not so bad (Burnham, Slough), to very good (Browns, Loughton), though after a service, you'd expect them to clean out your car and give it a wash... :(
Overall, the Vauxhall range is great, I bought an Astra for my mother-in-law, on a K-plate, and it's never broken down, so they keep on going! In her native Ghana, the car of choice is the Astra for many taxi drivers...
If you're going to buy a Vauxhall, you're making a good choice, though if you live in Stamford Hill, North London, you may have a bit of a trek to find a better dealer... :)
I am currently driving a Vauxhall Vectra estate as a hire car for work. It is a 2.0 16v estate, the first estate that I have ever driven, and if this is how they all drive then I would really consider getting one in the future. The Vectra offers plenty of cabin space, making the car feel like you are driving around whilst sitting in your living room. The 2.0 engine gives the big car the nippiness of a much smaller car, but handles like a dream, with power steering and ABS to assist your drive. Put your foot down in first and second for a real take off, and after that cruise steadily in the rest of the gears. The extras are very handy, such as Traffic Master, which informs you of all the traffic within a 10-mile radius, I have affectionately called it Mavis. The only problem is that if you are really getting into a song on the radio it comes on cutting in with its monotone computer voice. The car also offers Traction Control for those slippy winter roads, making you feel a little safer when going round those tight country bends. The air conditioning is so powerful that you could probably leave a loaf of bread in the car and it would stay fresh for a week. The only downside to this car is that it absolutely guzzles petrol, doing around 300 miles to a 60-litre tank. And unless you take the gears up to at least 3 and a half thousand revs per change then the car will not pull away smoothly when you raise the clutch. Other than that the car is comfortable to drive, and still retains the slickness and movement of a car half of its size. Well done Vauxhall.