This is the first time M15C codename is revealed as the official name of the TNGA 1.5.
I guess under the new nomenclature rules, the letter prefix states the cylinder dimension? M15 is basically 3/4 of the M20, so it makes sense. If they scaled it to eight cylinder, it would then be called M40 (doubtful, since I don't think their 4.0 performance engine will share the very undersquare design of the regular 500 cc/cylinder engines).
As for the second letter:
'A' currently means international models of both the hybrid and gasoline engine, including the A25A-FKS used in GAC-Toyota Camry. If I understand it correctly, the FAW-Toyota Avalon will also use the A25A.
'B' is ChDM hybrid engine, now applying to the A25B-FXS. Here it includes both imported and locally-produced hybrid engines.
'C' is ChDM gasoline engine, applying to the M20C/M15C-FKS.
Before the dynamic force era, Toyota China already uses different numerical prefix (such as '7GR' instead of '2GR') for mechanically identical engines.
Note that they are still preserving a capacity of 108k NRs per year. At this point it is not clear whether the M15C directly replaces the dirt cheap 1NR/2NR or the 8NR. The M15C will be close to the turbocharged 8NR in capabilities, but a significant step (and possibly an overkill) above the 1NR/2NR.
I guess under the new nomenclature rules, the letter prefix states the cylinder dimension? M15 is basically 3/4 of the M20, so it makes sense. If they scaled it to eight cylinder, it would then be called M40 (doubtful, since I don't think their 4.0 performance engine will share the very undersquare design of the regular 500 cc/cylinder engines).
As for the second letter:
'A' currently means international models of both the hybrid and gasoline engine, including the A25A-FKS used in GAC-Toyota Camry. If I understand it correctly, the FAW-Toyota Avalon will also use the A25A.
'B' is ChDM hybrid engine, now applying to the A25B-FXS. Here it includes both imported and locally-produced hybrid engines.
'C' is ChDM gasoline engine, applying to the M20C/M15C-FKS.
Before the dynamic force era, Toyota China already uses different numerical prefix (such as '7GR' instead of '2GR') for mechanically identical engines.
Note that they are still preserving a capacity of 108k NRs per year. At this point it is not clear whether the M15C directly replaces the dirt cheap 1NR/2NR or the 8NR. The M15C will be close to the turbocharged 8NR in capabilities, but a significant step (and possibly an overkill) above the 1NR/2NR.
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