Click above for high-res gallery of Tesla Roadster v1.5

Last January we landed an exclusive first drive of the Tesla Roadster. We were impressed, but well aware that the particular two-gear model we drove that wet afternoon wasn't identical to the version set to land in customers' hands later in the year. Last week, we were invited back to briefly test drive a genuine production model with the latest transmission and software updates (aka "powertrain 1.5"). Check out our round-two impressions after the jump. (Ed. Note: Sorry for the lack of live images, but we literally had about half-hour to drive the car before it was whisked away.)

Two big British car magazines are reporting on some of Tesla's future product plans today following the latest promotional tour by SVP Marketing Darryl Siry. There isn't a whole lot new in the articles that hasn't already been reported here and on AutoblogGreen over the past year, but there were a couple of interesting items and errors. First of all AutoCar is reporting that Tesla is planning to use the platform of the Model S sedan (formerly known as WhiteStar) for future vehicles, which makes perfect sense. Unfortunately, they are also reporting that Tesla is planning an electric SUV off that platform, so we contacted Siry to check on this. Siry told ABG that there are in fact no plans to build an SUV. An SUV body style was just used as an example to demonstrate the flexibility of the platform.

Click above for a high-res gallery of the Tesla Roadster.

Birthing a car is always difficult, and Tesla has seen its share of problems. The biggest hurdle to getting its all-EV Roadsters in customers' garages has been the transmission. Initially the company wanted to have a two-speed unit, but the unit from its first supplier, X-Trac, wasn't durable enough. Tesla then contracted Magna to help build a tranny, before a final try at designing its own transmission also ended abortively. In the end, to get cars rolling out the door, changes were made to the motor so that a single-speed transmission could be fitted.