The engine got the reinforced aluminum cylinder block. The er27 derived from the subaru ea first generation flat 4 was used as the sole engine option in the premium model 198891 subaru alcyone vx xt6 in the united states.

Subaru Legacy Wikipedia
Subaru flat 6 turbo. Ez36d uses the strengthened cylinder block inside of which there are cast iron sleeves 15 mm thick. In 2007 suv subaru tribeca received the biggest flat 6 subaru engine which was called ez36d. Producing 260 hp the engine helps the outback earn 2330 mpg way better than the 36r six. The main differences between ez36d and ez30 are as follows. The engine has asymmetric connecting rods 125 mm length. Subaru er27 subaru introduced its first six cylinder engine in its subaru xt sports car.
On their website subaru doesnt give much information on the specifications of the current flat six only saying. New 24 liter turbo will outperform competition with a v6 the new 2020 outback fa24 24 liter boxer turbocharged direct injection boxer engine will achieve acceleration and power equal to or better. The cylinder block height is the same 202 mm. This engine was originally intended for a former friend in 2012 hanna says. The subaru six cylinder engines are a series of flat 6 engines manufactured by subaru a division of fuji heavy industries made in three distinct generations. June 2020 issue digital magazine subscribe now.
In fact the turbocharged 25 liter flat four from subaru easily outperforms the larger six with a power output of up to 305 horsepower. All of subarus six cylinder engines are of a liquid cooled flat 6 four stroke design. And speaking of organically developing a subaru engine business asf machines own shop car is a subaru a 1993 impreza sedan which got upgraded with a twin turbo flat six eg33 subaru engine with the aim to make it a pikes peak contender. It replaced ez30 and was used only for the largest models. The cast iron sleeves have reduced thickness 15 mm instead 20 mm in the ez30. This mpi sohc 2 valve engine was based on the ea82 with two cylinders added to the front.
These changes allowed getting more significant displacement from 30 to 36 liter. The real news with the 2020 outbacks engine options is the new to outback 24 liter turbo four.