We took a shine to the Audi e-tron Quattro when it appeared in Frankfurt last year followed by a smaller version in Detroit. Why? Because it's simply stunning to look at... and has specs to match. The latest iteration was unveiled at the 2010 Paris Auto Show this morning – the e-tron Spyder concept. This open-top, plug-in-hybrid two-seater combines a 221-kW (300-hp) twin-turbo V6 TDI at the rear axle and two electric motors at the front to deliver a limited top speed of 250 km/h (155.34 mph), reaching 100 km/h (62.14 mph) from a standing start in just 4.4 seconds.