He didn't do to bad against alonso in qualifying. At best he was 2 tenths close to Alonso as a rookie. the average is 5 tenths..LOL. not bad.
Europe GP - 3 tenths
ALO - 1:38.717
GR - 1:39.040
Belgium - 7 tenths
ALO - 1:45.707
GRO - 1:46.359
Italy - 2 tenths
ALO - 1:23.497
GRO - 1:23.728
Singapore - 8 tenths
ALO - 1:47.757
GRO - 1:48.544 (Crash was it?)
Japan - 6 tenths
ALO - 1:31.401
GRO - 1:32.073
Brazil - 8 tenths
ALO - 1:21.657
GRO - 1:22.477
ABU - 3 tenths
ALO - 1:41.667
GRO - 1:41.950
After doing the maths Grosjean was about 100.57% behind Alonso in terms of lap time.