The Dynamic Force engines introduced an updated nomenclature system for Toyota engines and no longer employ the traditional iteration or generation of the engine followed by the one letter or two letter designation for the engine family (such as 5M-GE or 4GR-FE being from the M and GR engine families respectively) and instead incorporate the engine's displacement in between a two letter code such as the M20A, with the "20" denoting a 2.0-litre engine. On 12 June 2021, the first turbocharged four-cylinder model, named T24A, was introduced for the AZ20 series Lexus NX. On 16 October 2019, the three-cylinder M15A type, which would be installed in the XP210 series Yaris (specifically designed for Japan, Europe, Australia, and New Zealand), was officially announced. Starting with the four-cylinder A25A type installed in XV70 series Camry in June 2017, the V6 V35A and four-cylinder M20A types had also appeared. Toyota is also simplifying its lineup of transmissions, hybrid systems, and all-wheel drive systems. Previously, Toyota offered about 800 engine variants, most of which would be replaced with a much simpler lineup of 17 versions of nine Dynamic Force engines. In development and production of the engine, Toyota claims it would be a "completely new engine design based on the TNGA strategy".
Cylinder centreline is offset from crankshaft centreline, meaning that piston top dead center is always equivalent to several degrees of crankshaft rotation.Application of updated D-4S (multi-hole injector) system to achieve "high-speed combustion", resulting in thermal efficiency over 40%.Change of port end shape and expansion of seat inner diameter.Longer stroke to bore ratio (under-square design).Very high compression-moderated Atkinson cycle engine.Hydraulic variable valve timing on both intake and exhaust camshafts.The angle between intake and exhaust valve centreline is 41 degrees–the previous design was 31 degrees. Expansion of the valve clamping angle.Specifically, the cylinder head and intake port design improves the tumble flow (longitudinal vortex) to increase the air intake volume–the majority of intake flow is across that portion of the valve closest to cylinder centreline.
The engine was developed as an engine that is claimed to achieve both driving performance and environmental performance while pursuing high efficiency and low fuel consumption as well as having a "direct feeling, smooth and pleasant acceleration performance".
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