Growth performance of pigs obtained with three feeding strategies were compared. Strategies ALA, ALB and RAA differed by the feeding level (AL: ad libitum, RA: restricted) and the 3-phase feeding sequence that met amino acid requirements or not (subscripts A and B, respectively). Two batches (b1 and b2), each with 4 pens of 6 gilts or barrows per treatment, were used. Batch 1 was studied in winter and b2 in summer with the outdoor temperature being on average 10 °C higher so that it was not possible to keep the indoor condition at the thermoneutral level and the daily feed intake (DFI) of ALA decreased by 20% (ALA/b1: 2.12 vs ALA/b2: 2.49 kg/d, P<0.05) over the 26-105 kg body weight (BW) range. With reference to ALA/b1, the similar decrease in DFI due to feed restriction (RAA/b1: 2.13 kg/d) or to season (ALA/b2: 2.12 kg/d) was associated to a similar decrease in average daily gain (ADG, 1,034a, 866b and 888b d in ALA/b1, RAA/b1 and ALA/b2, respectively). The additional decrease in DFI due to cumulated effect of feed restriction and ambient condition (RAA/b2: 1.79 kg/d) induced a marked drop in ADG (698 g/d). Subsequently, feed restriction did not affect the feed conversion ratio (FCR) in b1 (2.46 vs 2.40), but increased it in b2 (2.56 vs 2.39, P<0.05). Sequence B did not affect DFI (P>0.05, ALB/b1: 2.42 vs ALA/b1: 2.38 and ALB/b2: 2.13 vs ALA/b2: 2.00 kg/d) but decreased ADG, resulting in a higher FCR (P<0.05, 2.55 vs 2.40 in b1, and 2.54 vs 2.39 in b2) especially in gilts (sex interaction: P<0.01). Carcass leanness assessed from backfat and muscle thicknesses was 1.5 percentage point higher in RAA than in ALA (62.4 vs 60.9, P>0.01) on average in both batches, with a larger difference in gilts, especially under warm conditions (b2). This study demonstrated that both FCR and carcass leanness were improved by a more adequate AA nutrition but that only carcass leanness was improved by feed restriction. It may be due to a different partition of energy intake between different functions (growth vs activity) and could motivate a more precise grading of the entire carcass to assess more accurately consequences of feeding strategy and ambient conditions on the composition of BW gain and final carcass value.