The UK magazine 'What Car' published a supplement magazine
on towcars a month or so ago. They tested 50 (non
US) vehicles in the full range of sizes from Golfs
up to Range Rovers. The 'clear winner' (their words)
overall was the VW Passat 2.0 TDI Sport 4motion wagon.

(kerbweight 1609kg, Max towing weight 2000kg, Max hitch
weight 85kg)

John Galloway