I did a similar trip at the end of June this year, went from folkstone to calais then through belgium to strasbourg, then through Switzerland then onto stelvio italy. From there back through Switzerland and onto stuttgart then from stuttgart to the ring for 2 days. 2000 miles and a properly epic trip. Our cars were my Z, 46 m3, 63 m6, rs4, ttrs, 46 330ci, 36 323 with m3 engine and a 38 728i
Going again next year although doing a different route cannot wait
was