Can't read too much into testing times, but BMW's V8 is looking promising with regards to the field. Toyota's V8 and 2006 car is also looking very strong. Yesterday was the first time many different F1 V8's came out to play together, so its interesting to see the lap time comparisons..
Barcelona* - 30/11/2005
1 . J. Button - BAR Honda - 1:14.111 (+ 0.000 ) - 97 laps
2 . F. Montagny - Renault R25 V10 - 1:15.548 (+ 1.437 ) - 52 laps
3 . J. Trulli - Toyota TF106 V8 - 1:17.019 (+ 2.908 ) - 65 laps
4 . R. Zonta - Toyota TF106 V8 - 1:17.440 (+ 3.329 ) - 20 laps
5 . N. Heidfeld - BMW Sauber V8 - 1:17.559 (+ 3.448 ) - 68 laps
6 . D. Coulthard - Red Bull Cosworth V10 - 1:18.392 (+ 4.281 ) - 62 laps
7 . J.M. Lopez - Renault R25 V10 - 1:18.428 (+ 4.317 ) - 52 laps
8 . C. Klien - Red Bull Cosworth V10 - 1:18.471 (+ 4.360 ) - 89 laps
9 . V. Liuzzi - Scuderia Toro Rosso RB1 V10 - 1:19.065 (+ 4.954 ) - 58 laps
10 . A. Davidson - BAR Honda V8 - 1:19.231 (+ 5.120 ) - 37 laps
11 . M. Webber - Williams Cosworth V8 - 1:19.625 (+ 5.514 ) - 70 laps
12 . N. Rosberg - Williams Cosworth V8 - 1:20.444 (+ 6.333 ) - 18 laps.