The powerful rear-mounted engines of Porsche’s long line of 911 sports cars made them small and fast. In a corner, though, they acted like a pendulum, leaving some less skilful drivers parked in roadside hedges. After an initial public offering (ipo) on September 29th, the luxury carmaker will also require nimble handling to ensure its strengths do not become a source of weakness.
In a nod to its most famous model, the ipo will comprise 911m…