At just under 3300 pounds, the Z4 doesn’t seem like a lightweight car, but for the purposes of the luxury roadster segment, it actually fares quite well on that front.
BMW, the self-proclaimed maker of “The Ultimate Driving Machine,” has set some tough standards for their new 2.0-liter engine. That’s good because, frankly, a four-banger replacing one of the most revered sixes in history needs some credibility-building. We have our own standards, so we set off...