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Why do diesel cars generally seem to have the exhaust pipe outlet pointing towards the road whereas petrol cars have pipes that stick straight out parallel to the tarmac??
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So the soot doesn't blow into the face of following traffic?
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Mondeos have the exhaust pipe pointing (curving) down on petrol and diesel engine models.
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And it blows straight out the back of the baked bean can size exhaust on my diesel Xsara. Perfect for when I overtake the cyclist that has wobbled in front of me for the last 2 miles!
(Please, it's only TIC, I'm a cyclist too, but I let people pass :P)
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Disguising the smoke is certainly a factor. It has been Ford policy to 'hide' exhaust pipes on all cars except performance versions. This is why the petrol one also has a curved down pipe, so the muffler box can be mounted higher and less visibly.
I think you will find with the advent of Stage IV diesels and particulate filters that some manufacturers will go back to straight pipes on diesels. e.g. BMW.
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Keeps the rear bumper free of black 'stains' - ever seen a broken diesel tailipe that has 'contaminated' the rear bumper with acres of black smeech?
That's the real reason, the other, as has been said, is to keep any smoke at a low level.
The Xsara tailpipe is the odd one out - sticking straight out, along with Dturbo 306's
--
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