In most cases, it takes ideal conditions – including a professional driver – to hit sixty in the time specified. As a result, some manufacturers quote conservative figures so as not to disappoint customers who can't manage the quoted time. Further confusing the situation, some automakers prefer to quote acceleration time in kilometers, but while the 0-100 km/h (62mph) standard might be very close to the mark, in acceleration times every millisecond counts.
This one's a bit comical. We're all aware that reducing your speed while driving leads to fuel savings and reduced emissions, but no one in their right mind in Washington is going to suggest we lower speed limits. That's apparently not so in Britain. Auto Express is reporting that last week, while the Members of the British Parliament were discussing climate change, Nia Griffith, a Labour Party MP (Member of Parliament), suggested an extremely cost-effective way of reducing the speed limit on al