Yeah, engineering is difficult. There is a LOT of maths. Compared to a geographer, who will have maybe 8 hours if they're lucky, you will feel like you're in full time employment- I had 29-30 hours a week scheduled time in my first and second year.
BUT BUT BUT
You can have a social life, of course you can. Engineers just have to be better at finding the balance. Generally, you'll get away with going out a lot at the start of term, but in the weeks leading up to exams, you'll have to lock yourself in a room revising for 18 hours a day to make up for it. Don't let that put you off- put it this way- I got a 2:1, a fraction of a percent off a first (thank god), but still managed to go off an do a couple of weeks skiing and sailing a term in the first couple of years. might have missed a few lectures, but I could catch up. Could probably manage 3 nights a week out down the pub. even with a 9:00am lecture the following morning. It depends how much self discipline you have. Use your first year to work out how much you can get away with, then ramp up the work from there to ensure you get a 2:1 or above.
In A Level terms I got AABC, which todays equivalent would put me at A*A*AB, as A-Level pass rates continue to rise year on year.
In terms of challenge- if you can manage an A-Level further maths course, you'll manage engineering at Uni.
One VERY important thing though. If you're going to be paying 2012 fees, you had damn well better make sure you do something that there are well paid jobs for, and that there is demand for. Engineering cuts it. David Beckham studies doesn't. If I were going again, I'd only do it if I did Engineering, Law or Medicine. Nothing else, IMHO, is worth the price they're asking, unless you want to stay in academia.
Pass rates are a red herring. most people who sit the exams are able to pass- if they weren't they'd never had got in, or would have left a long time before exams were sat.
Automotive engineering probably wont be any easier, but will restrict you more when applying for a job.
And if you're going to university for a good time and not to get a degree, I'd recommend you don't go. Go work as a holiday rep.
Stu Haynes, MEng MIET