According to Official Guinness Records,
The fastest time to push a car weighing 1,880 kg (4,144 lb 11 oz) a distance of one mile (1.609 km) is 15 min 21 sec and was achieved by Mario Mlinaric (Croatia) on set of The Strongest Farmer TV show in Zagreb, Croatia, on 12 June 2009.
For a complete list of 2009 records, please visit 2009 Guinness Records in Croatia.