I found this online, take it for what it’s worth..
MODELS / ENGINES / TRANSMISSION / SUSPENSION
The models shown are 20i, 30i, and 40i which correspond to their BMW engine equivalents. The 40i equates to the Z4 M40i, but the A90 Supra’s engine is designated as B58C (turbo 6 cylinder). The 20i engine is the B48D (turbo 4 cylinder) and the 30i engine is the B46D (turbo 4 cylinder).
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