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Winners and Losers: Porsche sales pop in April

Porsche sales spiked 82 percent in April and are up 46 percent for the year, parking the luxury automaker among the top five winners so far for 2011. The redesigned Cayenne made the biggest contribution, with sales up an eye-popping 384 percent from last April and 141 percent for this year. Porsche counted 1,578 copies of the Cayenne sold in April, versus 326 the year before.

Toyota unveils SEMA show Dream Build Challenge cars

Toyota's SEMA show plans this year are egalitarian: they include cars involved with two separate contests on which you, the custom car enthusiast, can vote online to your heart's content. Four cars took part in the Toyota Dream Build, now in its second year. Last year, Toyota's Dream Build enlisted people from the world of NHRA and NASCAR, who all came up with some extremely rad stuff.

BMW M4 Convertible revealed. Price from £60,730

The BMW M4 Convertible (pictured) revealed We reported last month that the new BMW M4 Convertible would debut at this year’s New York Auto Show, and here it is ahead of that debut complete with trick folding metal roof, 425bhp and a price tag that just nicks over the £60k line. A direct replacement for the old M3 Convertible, the M4 Convertible will cost you just over £4k more than the M4 Coupe, but for the extra money you get the same car but with infinite headroom – and a big weight penalty. The new 3-piece metal folding roof can be tucked away in a mere 20 seconds at the flick of a switch, with better noise insulation than the M3 Convertible had and more room in the boot when the roof is down too.