Can't reproduce on 32-bit Linux.

$ time python2.7 -c "print sum(xrange(3, 10**9, 3)) + sum(xrange(5, 10**9, 5)) - sum(xrange(15, 10**9, 15))"
233333333166666668

real    1m11.614s
user    1m11.376s
sys     0m0.056s
$ time python3.4 -c "print(sum(range(3, 10**9, 3)) + sum(range(5, 10**9, 5)) - sum(range(15, 10**9, 15)))"
233333333166666668

real    1m11.658s
user    1m10.980s
sys     0m0.572s

$ python2.7 -m timeit -n1 -r1 "sum(xrange(3, 10**9, 3)) + sum(xrange(5, 10**9, 5)) - sum(xrange(15, 10**9, 15))"
1 loops, best of 1: 72 sec per loop
$ python3.4 -m timeit -n1 -r1 "sum(range(3, 10**9, 3)) + sum(range(5, 10**9, 5)) - sum(range(15, 10**9, 15))"
1 loops, best of 1: 72.5 sec per loop

$ python2.7 -m timeit -s "a = list(range(10**6))" -- "sum(a)"
10 loops, best of 3: 114 msec per loop
$ python3.4 -m timeit -s "a = list(range(10**6))" -- "sum(a)"
10 loops, best of 3: 83.5 msec per loop

What is sys.int_info on your build?