Running a LCR to the redline in 1st will get around 35-40, 2nd will hit ~60mph, 3rd can get to 85ish and from then on your in illegal territory. From 30mph you can hit the top speed of the LCR in 6th so depends on whether you want to wait for the full boost. Dependant on the factors like weather, the coldness you will have varying degrees of performance but the official figures are pretty accurate.