A3 8P Benziner (2003–2013): 1.2 TFSI (CBZB), 1.4 TFSI (CAXC), 1.6 MPI (BGU, BSE, BSF, CCS), 1.6 FSI (BAG, BLF, BLP), 1.8 TFSI (BYT, BZB, CDAA), 2.0 FSI (AXW, BLR, BLX, BLY, BVY, BVX, BVZ), 2.0 TFSI (AXX, BPY, BWA, CAWB, CCZA), 3.2 VR6 (BDB, BUB); A3 8P Diesel: 1.6 TDI (CAYB, CAYC), 1.9 TDI (AGR, ALH, ATD, AXR, AHF, ASV, ASZ, BKC, BXE, BLS), 2.0 TDI (BKD, BMM, BMN, AZV, BMM, CBAA, CBAB, CFFB, CFHC)
A3 8V Benziner (2012–2020): 1.0 TFSI (DKRF), 1.2 TFSI (CJZA, CJZC), 1.4 TFSI/1.4 TFSI COD (CAXA, CZEA, CPTA, CPT, CPWA, CUK), 1.5 TFSI (DADA, DPCA), 1.8 TFSI (CJS, CJEB), 2.0 TFSI (CUNA, CRUB, DNF, DJH), S3 2.0 TFSI (CJXC, CJXG, CJXA); A3 8V Diesel: 1.6 TDI (CAYC, DDYA, DGT), 2.0 TDI (CFFB, CFHC, CUN, CUNA, CRBC, CRB, DEJA, DFM, DNU, CRU)
A3 8Y Benziner (ab 2020): 30 TFSI 1.0 (DLAA, DXDE), 30 g-tron 1.5 (DHFA), 35 TFSI 1.5 (DPCA, DXDB), 40 TFSI 2.0 (DFYA), S3 2.0 TFSI (DNNA, DNFF), RS3 2.5 TFSI (DNFB, DNWC, DNWD, DXHB); A3 8Y Diesel: 30 TDI/35 TDI/40 TDI 2.0 (DSUD, DTRB, DTRD, DSRB, DTSA, DTUA, DXRC, DXPA); A3 8Y Plug-in-Hybrid: 40/45 TFSI e (DGEA)
