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A Range Rover set up for offroad would be fine, or the White Knight
http://www.4x4web.co.uk/i/2107-2.jpg
http://www.whiteknight.ca/Picture%20CJA002.jpg

TVR or McLaren F1

A Nissan Patrol with twin lockers and 35" Baja Claws

A Nissan Patrol GQ or GU would fit the bill for me
http://www.offroader.com.au/readerrigs/photos/nissan-gq-patrol-4-2-ti-Bruce_sm.jpg

Get a Holden Monaro. Then you could modify it and you would have a brilliant car. Looks good goes well and sounds nice

Haven't toyota done a bit to.

It doesn't really matter what area of the ultimate car you say (performance, luxery, etc) it all helps.
Some more info on wat specks the car needs like 4wd, made of carbon fibre, etc

At school I am doing a project on THE ULTIMATE CAR. So if you can think of the ultimate car, or what the car would need. That would be great.

You could run Rancho shocks or tough dog shocks. They offer adjustment so you can run them soft when 4 wheel driving and then stiffen them back up when you get back on the black stuff....

SLR McLaren by far

Any Landrover will win for offroad ability hands down. But there build quality lets them down

An Atlas 2 transfer case. It is alot stronger than standard items and runs a lower ratio i believe. Have you ever seen the Australian Outback Challenge dvds or videos. Lockers also make a huge...