If you look closely, you might see some of the differences. For instance, the Roadster 2.5 gets a new rear air diffuser design, and the front fascia also has new diffuser vents. Forged silver or black wheels are new, too. Inside, the 2.5 is upgraded with better seats that offer more lumbar support, and the cabin has been made quieter through a number of different measures. Also, a navigation system with seven-inch touch-screen display is newly optional.
Not much else has changed for 2011. The Roadster remains a strictly low-volume vehicle, but there have still been well under 2,000 examples built. With a very tight interior, little cargo space, and not all that much choice in features or amenities, it's only for the most ardent (and affluent) EV enthusiasts.
Tesla Roadster production is slated to end later this year, but the upcoming Tesla Model S, due next year, will offer a lot more practicality as well as be quite a bit more affordable.
For more information about the 2011 Tesla Roadster 2.5—including more pictures and related news—see our full review of the Tesla Roadster.