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Porsche Boxster growing to make room for small two-seater, report says

The next-generation Porsche Boxster will get a longer wheelbase and measure nearly 173 inches long overall, British magazine Autocar says on its Web site. Why is the Boxster growing? To create room at the bottom of the Porsche lineup for a new two-seater based on the Volkswagen BlueSport concept shown at the Detroit auto show in 2009, the report says.

Mercedes SL (2012): aluminium saves 8% weight

Mercedes' new 2012 SL will weigh a solid 140kg less than today's SL roadster - a significant saving of some 8%. This crash diet has been enabled by the adoption of aluminium for the new SL. The learnings from the SLS gullwing are now trickling down to the higher-volume SL, which will be revealed in December 2011.

Infiniti previews new sports car concept for Geneva 2012

This is our second glimpse of a new range-extender sports car concept that Infiniti will unveil at the 2012 Geneva motor show in March; it's already been teased once before. So presumably the engine that's part of electrified powertrain isn't the company's big 3.7-litre V6? You're right there.