F1 testing round-up: Kimi Raikkonen and Ferrari lead on raw pace

After Vettel led the way at the end of the first test, Raikkonen responded to top the overall timesheet come the conclusion to the second at Barcelona's Catalunya track.

We dissect the winter testing performances

Like Vettel in test one, Raikkonen's leading time this week was set on the new-for-2016 ultra-soft compound, which he used to lap in 1m22.765s on day three.

More eye-catching, however, was Vettel using super-softs for his best lap on the final day. The four-time champion finished just 0.087 seconds behind Raikkonen in the week's overall times, and was comfortably faster than anyone else had been on that compound.

Pirelli estimates there is a 0.5s-0.6s performance gap between the types of rubber, highlighting the impressive nature of Vettel's run.

But Ferrari will no doubt be anxiously curious as to the true pace of its main rival Mercedes, which at barely any stage showed its hand - barring a blast on a set of soft tyres from Nico Rosberg on day one.

Rosberg's lap of 1m23.022s was ultimately just 0.257s adrift of Raikkonen, and 0.170s behind Vettel, with Pirelli suggesting a time difference of 0.5s between the super-soft and soft tyres.

But when it comes to reliability, Mercedes was head and shoulders clear of not only Ferrari, but every other team.

To add to the 675 laps from test one, Mercedes amassed a further 619 in test two, amounting to 1790 miles this week, and 3742 over the eight days - the equivalent of 19.6 Spanish Grands Prix.

Toro Rosso was Mercedes' closest rival on that front, clocking up 602 laps, for 3034 miles over the eight days, while Ferrari's grand total proved to be 2470 miles, a considerable 1302 miles less than Mercedes.

Rosberg emerged as the lap leader from the second test with 324, and overall with 656, pipping Hamilton by just 18.

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Toro Rosso, running with a 2015 Ferrari power unit this season, has every reason to be proud of its performance the past four days as Max Verstappen and Carlos Sainz Jr completed 303 and 299 laps respectively.

At the other end of the scale, Esteban Gutierrez managed just 49 as Haas endured a torrid week due to reliability issues, in stark contrast to its solid running in the first test.

McLaren and power unit supplier Honda showed they have moved on from last year's disastrous test sessions that were the forerunner to one of the worst seasons in the Woking team's history.

Over eight days at Barcelona in 2015, McLaren managed a paltry 301 laps, but fast forward 12 months and the Anglo-Japanese alliance achieved 710, with 453 in test two alone.

In terms of driver contrasts, there were none greater than at Renault as Kevin Magnussen enjoyed a trouble-free four days to accumulate 509 laps, whereas Jolyon Palmer was plagued by gremlins and totalled only 267.

COMBINED TEST TWO STATS:

Combined best times of week two:

Pos  Driver             Car                   Time       Gap      Tyres
 1.  Kimi Raikkonen     Ferrari               1m22.765s           US
 2.  Sebastian Vettel   Ferrari               1m22.852s  +0.087s  SS
 3.  Nico Rosberg       Mercedes              1m23.022s  +0.257s  S
 4.  Carlos Sainz Jr    Toro Rosso-Ferrari    1m23.134s  +0.369s  US
 5.  Felipe Massa       Williams-Mercedes     1m23.193s  +0.428s  S
 6.  Valtteri Bottas    Williams-Mercedes     1m23.229s  +0.464s  US
 7.  Nico Hulkenberg    Force India-Mercedes  1m23.251s  +0.486s  US
 8.  Max Verstappen     Toro Rosso-Ferrari    1m23.382s  +0.617s  US
 9.  Lewis Hamilton     Mercedes              1m23.622s  +0.857s  S
10.  Sergio Perez       Force India-Mercedes  1m23.721s  +0.956s  SS
11.  Kevin Magnussen    Renault               1m23.933s  +1.168s  SS
12.  Daniel Ricciardo   Red Bull-TAG          1m24.427s  +1.662s  S
13.  Jenson Button      McLaren-Honda         1m24.714s  +1.949s  US
14.  Fernando Alonso    McLaren-Honda         1m24.735s  +1.970s  S
15.  Felipe Nasr        Sauber-Ferrari        1m24.760s  +1.995s  S
16.  Jolyon Palmer      Renault               1m24.859s  +2.094s  SS
17.  Pascal Wehrlein    Manor-Mercedes        1m24.913s  +2.148s  US
18.  Marcus Ericsson    Sauber-Ferrari        1m25.031s  +2.266s  S
19.  Daniil Kvyat       Red Bull-TAG          1m25.049s  +2.284s  S
20.  Romain Grosjean    Haas-Ferrari          1m25.255s  +2.490s  S
21.  Esteban Gutierrez  Haas-Ferrari          1m25.422s  +2.657s  SS
22.  Rio Haryanto       Manor-Mercedes        1m25.899s  +3.134s  US

Total week two mileage per driver:

 1.  Nico Rosberg      937
 2.  Max Verstappen    876
 3.  Carlos Sainz Jr   865
 4.  Lewis Hamilton    853
 5.  Sebastian Vettel  847
 6.  Daniel Ricciardo  746
 7.  Nico Hulkenberg   746
 8.  Felipe Massa      717
 9.  Kevin Magnussen   709
10.  Jenson Button     700
11.  Valtteri Bottas   668
12.  Felipe Nasr       633
13.  Fernando Alonso   610
14.  Kimi Raikkonen    602
15.  Daniil Kvyat      550
16.  Sergio Perez      544
17.  Jolyon Palmer     544
18.  Marcus Ericsson   541
19.  Romain Grosjean   417
20.  Pascal Wehrlein   367
21.  Rio Haryanto      298
22.  Esteban Gutierrez 142

Total week two mileage by team:

 1.  Mercedes     1790
 2.  Toro Rosso   1741
 3.  Ferrari      1449
 4.  Williams     1385
 5.  McLaren      1310
 6.  Red Bull     1296
 7.  Force India  1290
 8.  Renault      1252
 9.  Sauber       1174
10.  Manor        665
11.  Haas         558

Total week two mileage by engine:

 1.  Mercedes      5131
 2.  Ferrari 2016  3182
 3.  Renault/TAG   2548
 4.  Ferrari 2015  1741
 5.  Honda         1310

COMBINED OVERALL WINTER TESTING STATS

Combined fastest times of winter testing:

Pos  Driver             Car                   Time       Gap      Tyres
 1.  Kimi Raikkonen     Ferrari               1m22.765s           US
 2.  Sebastian Vettel   Ferrari               1m22.810s  +0.045s  US
 3.  Nico Rosberg       Mercedes              1m23.022s  +0.257s  S
 4.  Nico Hulkenberg    Force India-Mercedes  1m23.110s  +0.345s  SS
 5.  Carlos Sainz Jr    Toro Rosso-Ferrari    1m23.134s  +0.369s  US
 6.  Felipe Massa       Williams-Mercedes     1m23.193s  +0.428s  S
 7.  Valtteri Bottas    Williams-Mercedes     1m23.229s  +0.464s  SS
 8.  Max Verstappen     Toro Rosso-Ferrari    1m23.382s  +0.617s  US
 9.  Daniel Ricciardo   Red Bull-TAG          1m23.525s  +0.760s  US
10.  Lewis Hamilton     Mercedes              1m23.622s  +0.857s  S
11.  Sergio Perez       Force India-Mercedes  1m23.650s  +0.885s  SS
12.  Kevin Magnussen    Renault               1m23.933s  +1.168s  SS
13.  Daniil Kvyat       Red Bull-TAG          1m24.293s  +1.528s  US
14.  Jenson Button      McLaren-Honda         1m24.714s  +1.949s  US
15.  Fernando Alonso    McLaren-Honda         1m24.735s  +1.970s  S
16.  Felipe Nasr        Sauber-Ferrari        1m24.760s  +1.995s  S
17.  Alfonso Celis Jr   Force India-Mercedes  1m24.840s  +2.075s  SS
18.  Jolyon Palmer      Renault               1m24.859s  +2.094s  SS
19.  Pascal Wehrlein    Manor-Mercedes        1m24.913s  +2.148s  US
20.  Marcus Ericsson    Sauber-Ferrari        1m25.031s  +2.266s  S
21.  Romain Grosjean    Haas-Ferrari          1m25.255s  +2.490s  S
22.  Esteban Gutierrez  Haas-Ferrari          1m25.422s  +2.657s  SS
23.  Rio Haryanto       Manor-Mercedes        1m25.899s  +3.134s  US

Total winter testing mileage by driver:

 1.  Nico Rosberg       1897
 2.  Lewis Hamilton     1845
 3.  Max Verstappen     1545
 4.  Carlos Sainz Jr    1490
 5.  Kevin Magnussen    1472
 6.  Sebastian Vettel   1412
 7.  Daniel Ricciardo   1322
 8.  Felipe Nasr        1316
 9.  Valtteri Bottas    1287
10.  Felipe Massa       1189
11.  Marcus Ericsson    1108
12.  Jenson Button      1090
13.  Kimi Raikkonen     1059
14.  Daniil Kvyat       1041
15.  Nico Hulkenberg    1033
16.  Fernando Alonso    963
17.  Sergio Perez       836
18.  Jolyon Palmer      772
19.  Romain Grosjean    743
20.  Pascal Wehrlein    729
21.  Rio Haryanto       671
22.  Esteban Gutierrez  628
23.  Alfonso Celis Jr   385

Total winter testing mileage by team:

 1.  Mercedes      3743
 2.  Toro Rosso    3034
 3.  Williams      2476
 4.  Ferrari       2470
 5.  Sauber total  2424*
 6.  Red Bull      2363
 7.  Force India   2253
 8.  Renault       2245
 9.  McLaren       2054
10.  Manor         1400
11.  Haas          1371
12.  Sauber 2016   1174*

* Sauber only ran its 2016 car in week two

Total winter testing mileage by engine:

 1.  Mercedes      9872
 2.  Ferrari 2016  5016
 3.  Renault/TAG   4608
 4.  Ferrari 2015  4284
 5.  Honda         2054