<pre><code>car_dict = {'MGA': ['1958'], 'Amphicar': ['1961'], 'Aston': ['1976'], 'Horsey': ['1899'], 'Bricklin': ['1975'], 'Zunndapp': ['1958'], 'Pontiac': ['2001'], 'Chevy': ['1976', '2004'], 'Mosler': ['1985'], 'Lamborghini': ['1986'], 'Peel': ['1966'], 'Ferrari': ['1980'], 'AMC': ['1970', '1978'], 'Yugo': ['1985'], 'BMW': ['2002'], 'Ford': ['1909', '1958', '1971', '1995', '2000'], 'Crosley': ['1949'], 'GM': ['1997'], 'Fuller': ['1933'], 'Chrysler': ['1971'], 'Chrysler/Desoto': ['1934'], 'Corvette': ['1980'], 'Lotus': ['1958'], 'Waterman': ['1957'], 'Overland': ['1911'], 'Triumph': ['1970', '1975'], 'Scripps-Booth': ['1913'], 'King': ['1957'], 'Camaro': ['1982'], 'De': ['1981'], 'Briggs': ['1920'], 'Fiat': ['1998'], 'Corvair': ['1961'], 'Trabant': ['1975'], 'Plymouth': ['1997'], 'Jaguar': ['1974', '2001'], 'Maserati': ['1984'], 'Morgan': ['1975'], 'Hummer': ['2003'], 'Cadillac': ['1981', '1982'], 'Renault': ['1956']}
# Transform the dict into a list
k = car_dict.keys ()
v = car_dict.values ()
car_list = zip (k,v)
# Sort the List: We take the second element of the List items (which is a list of the years) and use its length as the sorting criteria
car_list.sort (key = lambda x: len (x [1]))
# the last Element in the list is the one with the most years:
print car_list [-1] [0]
</code></pre>