Brian Makse explores the differences between BMW’s road-going M4 to its GT4-spec counterpart…

As a modestly successful amateur racer and lover of sports cars, I’ve become curious about modern race cars, built to GT3, GT4 or TCR specifications, and the road cars from which they were derived from.

What’s similar, what’s unique, what’s special, and most importantly, how do they drive?

Samantha Tan and her Canadian-based team, ST Racing, invited me to Virginia International Raceway to test her BMW M4 GT4.

Tan, a 21-year old college student, is coming off a strong start to her Pirelli World Challenge GTS SprintX season, having led the opening round at Circuit of The Americas and finishing on the podium with co-driver Nick Wittmer.

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