The 2.0-liter Mazda RF diesel engine with a pre-combustion chamber was produced from 1983 to 2003 in various variants, both naturally aspirated as RF-N and turbocharged as RF-T. There was also an upgraded version called RF1G for the 323 models and a supercharged RF-CX for the 626. The R-engine lineup also includes the following power units: RF-T and R2.
| Exact capacity | 1998 cm³ |
| Power system | forklift chambers |
| Engine power | 58 - 67 HP |
| Torque | 120 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 86 mm |
| Piston stroke. | 86 mm |
| Compression ratio | 21 - 23 |
| Engine features | SOHC |
| Hydraulic compensator. | there is no |
| Timing drive | strip |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 5.0 liters 5W-30 |
| Fuel type | diesel |
| Environmental class | EURO 0 |
| Approximate life expectancy | 300 000 HP |
| Exact capacity | 1998 cm³ |
| Power system | forklift chambers |
| Engine power | 71 HP |
| Torque | 128 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 86 mm |
| Piston stroke. | 86 mm |
| Compression ratio | 21.7 |
| Engine features | SOHC |
| Hydraulic compensator. | there is no |
| Timing drive | belt |
| Timing phase adjuster | there is no |
| Turbocharging | there is no |
| What oils to use | 5.0 liters 5W-30 |
| Fuel type | diesel |
| Environmental class | EURO 2 |
| Approximate life expectancy | 320 000 HP |
| Exact capacity | 1998 cm³ |
| Power system | forklift chambers |
| Engine power | 76 - 88 HP |
| Torque | 172 - 186 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 86 mm |
| Piston stroke. | 86 mm |
| Compression ratio | 21.1 |
| Engine features | SOHC |
| Hydraulic compensator. | there is no |
| Timing drive | strip |
| Timing phase adjuster | there is no |
| Turbocharging | compressor |
| What oils to use | 5.5 liters 5W-30 |
| Fuel type | diesel |
| Environmental class | EURO 1 |
| Approximate life expectancy | 250 000 HP |
| Exact capacity | 1998 cm³ |
| Power system | forklift chambers |
| Engine power | 71 - 92 HP |
| Torque | 172 - 195 nm |
| Engine block | cast iron R4 |
| Block head | aluminum 8v |
| Cylinder diameter | 86 mm |
| Piston stroke. | 86 mm |
| Compression ratio | 19 - 21 |
| Engine features | SOHC |
| Hydraulic compensator. | there is no |
| Timing drive | belt |
| Timing phase adjuster | there is no |
| Turbocharging | tak |
| What oils to use | 5.5 liters 5W-30 |
| Fuel type | diesel |
| Environmental class | EURO 1/2 |
| Approximate life expectancy | 250 000 HP |
| City | 8.1 litry |
| Route | 5.4 litry |
| Mixed | 6.3 litry |
The weight of the RF engine is 187 kg (with attachments). The RF engine number is located at the junction of the block and the cylinder head. These are simple and reliable diesel engines, most of their problems come from aging. Leaks are often discussed on forums, with oil sweating through the cylinder head gasket being a common issue. The timing belt should be replaced according to the schedule, either every 60,000 km or in case of valve interference. After 200-250 thousand km, cracks around the pre-chambers are often found. There are no hydraulic compensators, so don't forget to adjust the valves every 100,000 km.
| 323C I (BH) | 1995 - 1998 |
| 323 VI (BJ) | 1998 - 2000 |
| 626 II (GC) | 1983 - 1987 |
| 626 III (GD) | 1987 - 1991 |
| 626 IV (GE) | 1991 - 1997 |
| Bongo III (SS) | 1984 - 1995 |
| Concord | 1988 - 1991 |
| Sportage 1 (JA) | 1998 - 2003 |
| Vitara 1 (ET) | 1994 - 1998 |
| Vitara GT | 1998 - 2003 |
The 2.0-liter Mazda RF7J diesel engine was produced by the company from 2005 to 2010 and installed in European versions of popular third, fifth, or sixth series models. This engine was essentially a modernized version of the well-known RF5C diesel engine. The MZR-CD lineup also includes the RF5C and R2AA engines.
The 2.2-liter Mazda R2 diesel engine, with an overhead camshaft, was produced from 1983 to 2007 and installed in many commercial vehicle models under the Mazda, Kia, and Ford brands. After being equipped with the Common Rail system, this power unit received a new designation R2AA. The R-engine lineup also includes the RF and RF-T engines.
The 2.2-liter Mazda R2AA diesel engine was produced by the company from 2008 to 2013 and installed in popular models such as the third and sixth series, as well as the CX-7 crossover. There was a version of this engine with reduced power output, rated at 125 HP, labeled as R2BF. The MZR-CD lineup also includes the following engines: RF5C and RF7J.
The 1.5-liter Mazda S5-DPTS diesel engine was produced in Japan from 2014 to 2019 and was installed in Mazda's smallest models such as the Mazda2, Mazda3, and CX-3 crossover. There is also a version of this engine with the i-ELOOP energy recovery system, designated as S5-DPTR. The Skyactiv-D range also includes the following engines: S8-DPTS and SH-VPTS.
The 2.5-liter turbocharged engine Audi CEPA 2.5 TFSI was produced by the company from 2009-2014 and was installed in the sport versions of the TT RS model in the 8J body type, as well as the RS3 in the 8P body type. The more powerful version, designated as the TT RS plus, had an engine called CEPB, generating 360 horsepower and a torque of 465 Nm. The EA855 engine family also includes the following units: - CTSA, - DAZA, - DNWA.
The 2.2-liter diesel engine Peugeot DW12MTED4 or DW12M was installed from 2007 to 2013 and used in the Mitsubishi Outlander SUV and its twin models, such as the Peugeot 4007 and Citroen C-Crosser. This engine was available in two versions: 4HN compliant with Euro 4 emission standards and 4HK compliant with Euro 5 emission standards. The DW12 engine range includes: DW12TED4, DW12BTED4, DW12CTED4, and DW12UTED.