Editing Ford Cologne V6 engine (section)

===2.9 Cosworth===
A special twin [[DOHC]] (QUAD CAM) version of the 2.9 was created by [[Cosworth Engineering]] in 1991. Although it shared the same block as the standard 2.9, power output was up to {{cvt|195|PS|kW hp|0}} and torque was boosted to {{cvt|203|lbft|Nm|0}} at 4500&nbsp;rpm. This engine (code BOA) was used in the Ford Scorpio Cosworth 24V. This engine configuration was only paired with an improved A4LDe automatic gearbox with partial electronic shift control. No [[manual gearbox]] was offered from the factory.

The standard Ford-issued block was machined differently to improve strength. In place of the single-cam arrangement, an endless duplex hydraulically tensioned timing chain was used to drive the overhead cams. The chain measured {{cvt|2.2|m}}.<ref>2.9 24V Cosworth BOA Engine Ford Service guide</ref> The casting and bearings for the standard underhead cam were repurposed for a shaft which drove the oil pump. Ignition was controlled by an [[Ford EDIS|EDIS]]-6 system, which would become a standard feature.

The engine was known for its substantial increase in power delivery above 4000&nbsp;rpm relative to the unmodified version; in recent years, the engine has become a popular choice as a replacement engine for the Ford Sierra XR4x4 and XR4i.

An improved version of this engine (code BOB) was available in the restyled 1995 Ford Scorpio. Differences included two simplex chains with two hydraulic tensioners and the addition of a variable-length intake system called [[Variable length intake manifold|VIS]]. Power output was increased to {{cvt|210|bhp|kW PS|0}}. This was mated to a fully electronically controlled A4LDE [[automatic transmission]].