Peugeot, Citroën, BMW Prince Petrol Straight-4 engine

 Prince is the codename for a family of automobile straight-4 engines developed by PSA Peugeot Citroën and used by BMW. It is a compact engine family of 1.4–1.6 L in displacement and includes most modern features including gasoline direct injection, turbocharging, BMW VANOS and variable valve timing.

The BMW variants of the Prince engine are known as the N13 / N16 and N18. It replaced the Tritec engine family in the Mini and was first introduced in 2006 for MINI. Later in 2011 also for BMW models F20 116i and 118i. This was the first longitudinal engine mount option for Prince engine.

PSA has started to use the Prince family in 2006 to replace their TU family — the Peugeot 207 being the first car to receive it.

The engine's components are produced by PSA at their Douvrin, France, facility, with MINI and BMW engine assembly at Hams Hall in Warwickshire, UK. The co-operation was announced on 23 July 2002 with the first engines produced in 2006. The Prince engine project is not related to the Prince Motor Company.

In late 2006, an extension of the cooperation between the two groups was announced, promising new four-cylinder engines, without further details.

On 29 September 2010, it was announced by BMW that the 1.6Turbo version of the Prince engine would be supplied from 2012 to Saab for use in forthcoming models, primarily the 9-3. However with the closure of SAAB supply never started.

At the Geneva Auto Show 2011, Saab unveiled their latest concept vehicle Saab PhoeniX with BMW Prince Engine 1.6T 200 hp 

On 25 June 2014 1.6-litre turbo Prince engine won its eighth consecutive International Engine of the Year Award in the 1.4 to 1.8-litre category. In 2014 the Prince engine beat, among others, the new BMW B38 engine which is replacing the Prince engine in the Mini and BMW lineups.

Design

The Prince family shares its basic block dimensions with the previous PSA TU engine family. Engineering design was directed by PSA with some support provided by BMW, including their Valvetronic variable valve lift system on the intake side. Other features include on-demand oil and water pumps. Gasoline direct injection with a twin-scroll turbocharger will be used on the higher power versions.

All Prince engines will share 84 mm (3.3 in) cylinder spacing and a 77 mm (3 in) bore. The engine features a two-piece "bedplate" aluminum crankcase for extra stiffness.

1.4 litre EP3/EP3C (PSA)

The 1.4 L PSA EP3 and EP3Cis the smallest member of the Prince family with a stroke measuring 75 mm (2.953 in) and total capacity of 1397 cc. Depending on application, power output varies from 90 to 95 PS (66 to 70 kW; 89 to 94 bhp) while torque varies from 136 to 140 N·m (100 to 103 lbf·ft).

Citroën C3 1.4 VTi 16V  Engine specification.

Applications:

• 2005-2006 Peugeot 307
• 2005–present Peugeot 207
• 2007–2010 Mini One
• 2007–present Peugeot 308
• 2009–present Citroën C3
• 2009–present Citroën C3 Picasso
• 2012–present Peugeot 208

1.6 litre EP6/EP6C naturally aspirated (PSA)

The 1.6 L engine is used in the second-generation MINI and various Peugeot 207 models. It has an 85.8 mm (3.4 in) stroke for a total of 1598 cc of displacement.

The naturally aspirated variant (EP6, EP6C) has conventional fuel injection and lost-foam cast cylinder heads. Its 11:1 compression ratio creates an output of 120 PS (118 hp/88 kW) at 6000 rpm with a redline of 6500 rpm. Torque is 118 lb-ft (160 N·m) at 4250 rpm.

Example Peugeot 3008 1.6 VTi Engine specification

Applications:

• 2007–present Peugeot 207 Sport
• 2007–2010 MINI Cooper
• 2011–present Mini One
• 2012–present Peugeot 208
• 2013–2015 Peugeot 2008
• 2007–present Peugeot 308
• 2010–present Peugeot 3008
• 2011–present Peugeot 508
• 2008–present Citroën C4
• 2009–present Citroën DS3
• 2009–present Citroën DS4
• 2009–present Citroën C3
• 2009–present Citroën C3 Picasso

1.6 litre turbocharged (PSA)

The turbocharged 1.6 L unit adds gasoline direct injection and has special low-pressure die-cast heads. It has an 85.8 mm (3.4 in) stroke for a total of 1598 cc of displacement.

At first, there were two versions on offer - the THP150 and THP175, also known as the EP6DT and EP6DTS respectively within Peugeot. The first was later updated as EP6CDT and also a THP163, EP6CDTM.There is also EP6CDT MD - with lowered compression ratio.

For the THP150 maximum torque is 177 lb-ft (240 N·m) at 1400 rpm, remaining flat to 5000 rpm. Power output is 150 PS (148 hp/110 kW) at 5500 rpm.

Example Citroën DS3 1.6 THP 16V (155bhp) Engine specification

Applications:

• 2006–present Peugeot 207 CC/GT
• 2007–present Peugeot 308
• 2011–present Peugeot 508
• 2008–present Citroën C4
• 2008–present Citroën C4 Picasso
• 2013–present Citroën C4 Sedan - the car assembled in Russia, Kaluga
• 2009–present Citroën DS3
• 2010–present Citroën DS4
• 2012–present Citroën DS5
• 2011–present Peugeot 408 Sport
• 2012–present Peugeot 208

For the THP163 maximum torque is 177 lb-ft (240 N·m) at 1400 rpm, remaining flat to 5000 rpm. Power output is 165 PS (163 hp/110 kW) at 5500 rpm.

Applications:

• 2011–present Peugeot 408

For the THP175 (EP6DTS, later EP6CDTS) maximum torque is 178 lb-ft (247 N·m) at 1600 rpm, remaining flat to 5000 rpm. Power output is 175 PS (173 hp/128 kW) at 5500 rpm. An overboost function is available which temporarily increases torque to 192 lb-ft (260 N·m) between 1700 rpm and 4500 rpm in gears 3 to 5.

Example Peugeot 207 GTi 1.6 16V GTi THP (175bhp) Engine specification

Applications:

• 2006–2010 Peugeot 207 RC
• 2007–2010 MINI Cooper S
• 2007-2011 MINI JCW (154 kW version of engine - only used by BMW)
• 2008–present Peugeot 308
• 2010–present Citroën DS3 Racing - EP6CDTS - 202 hp

In 2010 Peugeot released 1.6 THP engine (EP6CDTX) with 200 hp at 5500 RPM, maximum torque 275 @ 1700 RPM. It featured direct injection, twin-scroll turbocharger and variable valve lift.

Applications:

• 2010–present Peugeot RCZ
• 2010–present Peugeot 308 GTi
• 2010–present Citroën DS4
• 2012–present Peugeot 208 GTi

PSA has now released a new Euro 6 engine based on the THP in the following Engine codes:

• EP6FDTX - 205/208/210 hp 1.6l THP Peugeot 208 GTi
• EP6FDTR - 250/270 hp 1.6l THP Peugeot 308 GTi
• EP6CDTR - 270 hp 1.6l THP Peugeot RCZ

BMW N13 / Mini N18

The turbocharged 1.6 litre variant used by BMW and Mini is called the N13 for BMW applications and the N18 for Mini applications. The N13 replaced the naturally aspirated BMW N43 and was produced from 2011 to 2015. It is BMW's first turbocharged 4-cylinder petrol engine since the 2002 Turbo ceased production in 1974.

The N13/N18 engine uses direct injection, a twin-scroll turbocharger and Valvetronic (variable valve lift). BMW sold the N13 alongside the larger displacement BMW N20 turbocharged straight-4 engine. The N13 was effectively replaced by the turbocharged 3-cylinder BMW B38 engine.

Applications:

75 kW version

• 2012–2015 F20 114i

100 kW version

• 2011–2015 F20 116i
• 2012–2015 F30 316i

125 kW version

• 2011–2015 F20 118i
• 2012–2015 F30 320i ED

Reliability 

The 150  hp and 175  hp THP supercharged versions of the "Prince engine" were sometimes prone to distribution problems before 30,000  km . BMW has issued a technical note (SI M 11 02 07) concerning the replacement of the timing chain tensioner with a new, better calibrated model,The symptoms, according to Autoplus magazine, are a loss of power, linked to a shift in the distribution, or significant cold snaps linked to the relaxation of the distribution chain. These symptoms occur before 30 000  km to 50 000  km and can lead to engine breakage.

These problems are supposed to be eradicated since the switch to 156  hp in April 2010. However, many models continue to be affected by this lack of distribution, including the coupe RCZ 1,6l THP 156, and this on models produced until 2012. The hydraulic tensioner is still incriminated .

List of vehicles Prince EP engine 

Peugeot:207,208,2008,308,3008,408 II,508,5008

Citroën:C3,C3 Picasso,C4 II,C4 Picasso,C5 II,DS3,DS4

BMW:BMW 1 Series,BMW 3 Series

Mini:Mini One and Mini Cooper,Mini Countryman

The three-cylinder engines of the EB series replace the 4-cylinder EP atmospheric engines from 2012 to the end of 2015.

Supercharged versions Turbocharged engines 

Peugeot:207,208,308 / 308 II,3008,Peugeot 408 / 408 II,508,5008,RCZ

Citroën:C4 II,C4 Picasso / Picasso II,C5 II,DS 3,DS 4,DS 5 / 5LS,DS 6,DS 7

BMW:BMW 1 Series,BMW 3 Series

Mini:Mini Cooper S,Mini Countryman,Mini John Cooper Works

PGO Automobiles:PGO Cevennes,PGO Hemera,PGO Speedster II

Secma  :Secma F16 Turbo