It's a cheap European muscle car. My pre-1990 12v version has 177hp (although I suspect it is a bit less now).
The GSI fuel consumption is just under 20MPG in the city, and around 23MPG on long trips.
It has around 30 hp less than the 24v post-90 version (more than 200hp), and is more thirsty too.
Great sound, sporty and comfortable ride, good brakes and addictive acceleration. After getting used to the grunt and the torque, I could use some more. I paid £650 and am not planning to invest more. It should last until the next MOT, and then I'll probably replace it with a Carlton 3.0 24v Estate or a Senator 24v.
The one thing which is a bit of a disappointment is the gearbox and the gear change. The gear ratios are a bit surprising, the 1st gear being extremely short, the 2nd is nice, and I often use it to start from zero. A 6th gear for motorway cruising would be nice, but then it's an 80s car... The gear change travel is a bit long; the whole thing appears more out of a truck than being constructed for a car.
The GSIs are often slightly cheaper than the Senators 3.0 12v or 24v, but share most of the components, including the engine. My recommendation is an automatic, and therefore buy the normal Carlton 3.0 or a Senator (the Police Senator is often equipped with manual as well, normal versions have only been sold with an automatic transmission).