Sedan Nissan Skyline R31, released in 1985, became a turning point in the history of the iconic Japanese model. This generation received all-wheel drive for the first time ATTESA (predecessor of the system from the R32 GT-R), turbocharged engines RB20DET and an aggressive design that laid the foundation for future sporty versions. The R31 is often overlooked compared to the more famous R32 and R34, but it was this model that became the bridge between the classic round headlights R30 and the legendary GT-R.
From an engineering point of view, Skyline R31 ahead of its time: electronic suspension control debuted here HICAS (rear steering), options with 4WD appeared, and turbo engines of the series RB Even then they demonstrated potential for tuning. Today, the R31 is a rare visitor to the secondary market, but its value among collectors and drifters is growing every year. In this article we will analyze all key aspects: from technical characteristics to the nuances of operation and modifications.
Technical characteristics of Nissan Skyline R31: engines, transmissions, suspension
Platform R31 offered a wide range of power units - from naturally aspirated sixes to turbocharged monsters. Basic versions were equipped with motors CA18(i) (1.8 l, 90-105 hp) and RB20E (2.0 l, 130 hp), but the turbo versions are of real interest:
- 🔥 RB20DET — 2.0 l, turbo, 180-190 hp. (depending on the market). This engine became the basis for tuning and was installed on top versions HR31 And GTS-R.
- 💨 RB20DET-R — “rare bird” with a reinforced block, intercooler and 210 hp. (Japanese market only).
- ⚡ RB24DET — 2.4 l, turbo, ~200 hp. (export versions for Australia).
- 🚗 RD28T — 2.8 liter diesel with a turbine (85 hp), extremely rare.
Transmissions ranged from a 4-speed automatic to a 5-speed mechanics (including close passes in sports versions). Four-wheel drive ATTESA (in version GTS-X) worked according to the 37:63 scheme (front:rear) and had a manual differential lock. Suspension - classic for Skyline: MacPherson front and multi-link rear, but with a unique system HICAS, which turned the rear wheels up to 0.5° to improve handling.
| Modification | Engine | Power (hp) | Drive | Box |
|---|---|---|---|---|
| HR31 GTS | RB20DET | 180-190 | RWD | 5MT/4AT |
| HR31 GTS-R | RB20DET-R | 210 | RWD | 5MT |
| HR31 GTS-X | RB20DET | 180 | 4WD (ATTESA) | 5MT |
| DR30 (export) | RB24DET | 200 | RWD | 5MT/4AT |
Feature R31 — electronic control system ECU, which in top versions made it possible to regulate the boost pressure (up to 0.7 bar). However, early models suffered from "childhood diseases": e.g. the Garrett T25 turbine in the RB20DET often failed due to insufficient cooling at idle.
- RB20DET (turbo 2.0)
- RB20DET-R (210 hp)
- RB24DET (export 2.4)
- CA18DET (1.8 turbo)
- Other
Weaknesses and typical problems of the Nissan Skyline R31
Despite advanced technologies, R31 has a number of vulnerabilities that you need to be aware of before purchasing. The main problem is corrosion. The body is prone to rust in the following areas:
- 🚗 Thresholds and wheel arches - especially at the back, where dirt accumulates.
- 🔩 Suspension mounts - rust from the inside, which leads to backlash.
- 🚪 Doors and trunk lid — the drainage holes become clogged and water accumulates inside.
- 🔧 Spars - safety critical and requires careful inspection.
The second "sore topic" - RB series engines. Turbo versions suffer from:
- 🔥 Turbine overheating (Garrett T25) due to lack of cooling at idle.
- 🛢️ Oil starvation during sharp turns (problem with the oil receiver).
- 🔌 Wiring problems — oxidation of contacts in ECU and sensor harnesses.
⚠️ Attention: Upon purchase R31 with motor RB20DET Be sure to check the compression in the cylinders. The norm is 12-13 bar, below 10 bar indicates wear of the rings or valves. Also pay attention to the color of the exhaust: blue smoke indicates an oil burn, black smoke indicates an over-enriched mixture (problems with the injectors or air sensor).
The transmission and suspension also require attention:
- 🔄 Gearbox (especially automatic) - the synchronizers of the 2nd and 3rd gears wear out.
- 🔗 Drive shafts — in all-wheel drive versions, CV joint boots often tear.
- 🔧 Suspension — silent blocks and stabilizer bushings “live” no more than 50 thousand km.
Before buying R31, be sure to check the system operation HICAS. If the rear steering mechanisms fail, the car becomes uncontrollable at high speeds. Symptoms of malfunction: knocking in the rear suspension and “yaw” on the road.
Modifications and rare versions: what collectors should look for
Among the versions Nissan Skyline R31 There are real rarities that today are valued above standard models. The most popular:
- 🏆 HR31 GTS-R — “racing” version with motor RB20DET-R (210 hp), reinforced body and limited slip differential. Only ~800 copies were produced.
- 🚀 HR31 GTS-X - all-wheel drive version with ATTESA And HICAS. Rare on the secondary market.
- 🌏 DR30 (export) - Australian and European versions with motor RB24DET (2.4 l). They differ in simpler electronics and “tenacious” turbines.
- 🏁 Group A — homologated racing cars (about 500 pieces) with wide arches and an engine of up to 300 hp.
The version deserves special attention HR31 GTS-4 - all-wheel drive sedan with RB20DET and automatic transmission. This model was focused on comfort, but today it is appreciated for its unique combination of all-wheel drive and turbo engine. Cars with original paint are especially prized among collectors. "Gun Metallic Gray" (code 703) or "Wine Red" (code 305).
| Modification | Years of manufacture | Engine | Drive | Market Price (2026) |
|---|---|---|---|---|
| HR31 GTS-R | 1987-1989 | RB20DET-R | RWD | $25 000–$40 000 |
| HR31 GTS-X | 1986-1990 | RB20DET | 4WD | $15 000–$25 000 |
| DR30 (Australia) | 1986-1989 | RB24DET | RWD | $12 000–$20 000 |
| Group A | 1987 | RB20DET (mod.) | RWD | $50 000+ |
When looking for rare versions, pay attention to VIN code. For example, GTS-R has a body code HR31-003***, and Group A - special markings HR31-400***. Also check for original parts: spoilers, wheels Speedline and interior with leather seats Recaro.
How to distinguish an original GTS-R from a replica?
Original HR31 GTS-R has unique details:
- Red seat belts with Nissan logo.
- Special license plate on the glove compartment (serial number).
- Reinforced brake calipers Nissan Competition.
- No sunroof (unlike standard GTS).
Replicas are often caused by VIN code mismatches and lack of original documentation.
Tuning Nissan Skyline R31: from naturally aspirated to 500+ hp.
Tuning potential R31 limited only by budget. Basic RB20DET with proper modification it gives 300-400 hp without loss of reliability, and forced versions exceed the mark of 500+ hp Main directions of modifications:
- 🔥 Turbine: Replacement of standard Garrett T25 on T28 or GT28RS adds 50-80 hp when configured correctly.
- 💨 Intercooler: Installing a front intercooler (for example, from R32) reduces the boost temperature by 30-40°C.
- ⚡ Fuel: Go to E85 or installing additional injectors (for example, Nismo 550cc).
- 🔧 Control unit: Replacing the stock ECU with Haltech, AEM or Nistune for flexible customization.
For all-wheel drive versions (GTS-X) system improvements are relevant ATTESA:
- 🔄 Replacing the viscous coupling with mechanical locking differential (For example, Cusco or Nismo).
- 🛠️ Strengthening drive shafts and axle shafts (standard ones cannot withstand more than 350 hp).
The suspension and brakes also require attention:
- 🚗 Installation coilovers (For example, Tein or BC Racing) with adjustable stiffness.
- 🔧 Replacing brake calipers with 4-piston ones from R32 GT-R or Z32 300ZX.
⚠️ Attention: When forcing RB20DET above 350 hp be sure to strengthen gearbox. Standard 5-speed manual transmission (codeFS5R30A) can withstand up to 320 Nm, after which the synchronizers and bearings begin to crumble. The solution is to install a gearbox from R32 GT-R (codeFS5R30Awith reinforced shafts) or Getrag.
An example of budget tuning to start with:
☑️ Basic modifications for RB20DET (up to 300 hp)
Comparison with other generations of Skyline: R30 vs R31 vs R32
Nissan Skyline R31 often compared to its predecessor R30 (“round headlights”) and successor R32 (first generation GT-R). Each of these generations has unique characteristics:
| Parameter | R30 (1981-1985) | R31 (1985-1990) | R32 (1989-1994) |
|---|---|---|---|
| Engines | L20ET, RB20DET (up to 160 hp) | RB20DET (190 hp), RB20DET-R (210 hp) | RB20DET (215 hp), RB26DETT (280 hp) |
| Drive | RWD/4WD (simple system) | RWD / ATTESA (front wheel drive) | RWD / ATTESA E-TS (electronic control) |
| Suspension | MacPherson/multi-link | MacPherson / multi-link + HICAS | Multi-link front and rear + Super HICAS |
| Tuning potential | Limited (weak body, engines L-series) | High (strong body, engines RB) | Very tall (legendary) RB26DETT) |
| Price (2026) | $8 000–$15 000 | $12 000–$40 000 | $20 000–$100 000+ |
R31 occupies an intermediate position: it is more modern R30 (better electronics, stronger body), but simpler R32 (there are no complex systems like ATTESA E-TS). Main advantage R31 — balance between price and potential. For example, motor RB20DET cheaper to maintain than RB26DETT, but at the same time allows you to get similar power after modifications.
From a controllability point of view, R31 more "analogue" than R32. The lack of complex electronics makes it predictable in drifting, and the system HICAS (when working properly) improves stability at high speeds. However R32 wins in dynamics thanks to a more advanced transmission and engine RB26DETT.
If you need a project for drifting or street racing with minimal investment, R31 - the best choice among Skyline. It's cheaper R32 in purchase and repair, and the potential of engines RB20DET almost as good as younger versions RB25DET.
How to choose a Nissan Skyline R31 on the secondary market: buyer’s checklist
Purchase Nissan Skyline R31 - not an easy task. Most copies have a mileage of over 200 thousand km, and original spare parts are becoming scarce. Here's what to look for:
1. Body condition:
- 🔍 Check the sills, arches and side members for through corrosion.
- 🚪 Inspect the drainage holes in the doors and trunk.
- 🔧 Make sure that the trunk lid does not sag (a sign of rusty hinges).
2. Engine and transmission:
- 🔥 Start the engine when cold - there should be no knocking or smoking.
- 🛢️ Check the oil for metal shavings (a sign of turbine or bearing wear).
- 🔄 Make sure that the gearbox does not “knock out” the gears and there is no play in the clutch.
3. Electronics:
- 💡 Check the operation of all sensors (temperature, oil pressure, fuel level).
- 🔌 Make sure the system HICAS not disabled (owners often remove it due to breakdowns).
- 📡 Check for errors in the ECU (you can use a diagnostic scanner or the “light bulb method”).
4. Documentation:
- 📄 Check the service history (especially timing belt and turbine replacements).
- 🔖 Make sure that the VIN code on the body matches the documents.
- 🚗 If the car is imported, check for customs clearance and PTS.
⚠️ Attention: Beware of cars with engine swap (for example, RB25DET instead of the regular one RB20DET). Such projects are often assembled "on the knee" and may have problems with electronics or transmission. If the seller claims that the engine is “standard”, but the power is stated to be above 200 hp, ask for proof (dynamometer sheet or tuning receipt).
Average prices on the market (2026):
- 🚗 Standard version (RB20E/CA18, RWD) — $8 000–$12 000.
- 💨 Turbo version (RB20DET, RWD) — $15 000–$25 000.
- 🏆 GTS-R or GTS-X — $25 000–$40 000.
- 🌍 Export versions (DR30, RB24DET) — $12 000–$20 000.
When inspecting the R31, be sure to check the operation of the air conditioner. In these machines, the compressor often fails (the cost of a new one is ~$800), and refilling with R12 freon is expensive due to its shortage.
Operation and maintenance: what the owner needs to know
Service Nissan Skyline R31 requires attention to detail. Here are the key points:
1. Engine:
- 🛢️ Oil: Change every 5,000 km (semi-synthetic 10W-40 or synthetic 5W-40). Turbo versions require oil with approval API SG/SH.
- 🔥 Turbine: After driving, let the engine idle for 1-2 minutes to cool the turbine.
- ⚙️ Timing belt: Replacement every 80,000 km (if the valve breaks, the valve bends!).
2. Transmission:
- 🔄 Manual transmission: Oil GL-4 75W-90, replacement every 50,000 km.
- 🔗 Differential: Oil GL-5 80W-90, replacement every 60,000 km.
- 🚗 ATTESA: Check the oil level in the transfer case every 30,000 km.
3. Suspension and brakes:
- 🔧 Silent blocks: Change every 50,000 km (especially rear ones).
- 🛑 Brake pads/discs: The front pads last ~20,000 km, the rear pads - 30,000 km.
- 🔄 Steering rack: Play more than 10 mm is a sign of wear.
4. Electronics:
- 🔌 Wiring: Contact oxidation in the fuse box is a common problem.
- 💡 Sensors: Throttle position sensor (TPS) fails every 100,000 km.
- 📡 ECU: If there are signs of “glitches” (dips, unstable idle), check the capacitors on the board.
Recommended replacement parts:
| Detail | Original number | Analogue | Replacement period |
|---|---|---|---|
| Oil filter | 15208-40X00 |
Mann W710/80 | Every oil change |
| Air filter | 16546-40X00 |
K&N 33-2074 | Every 20,000 km |
| Spark plugs | 22401-40U00 |
NGK BCP7ES | Every 30,000 km |
| Timing belt | 13028-40X00 |
Gates T274 | Every 80,000 km |
For owners R31 useful to have on hand:
- 🔧 A set of tools with heads of 10, 12, 14 mm (most fasteners in the car fit these sizes).
- 📖 Repair Manual (Nissan Skyline R31 Service Manual).
- 🔌 Diagnostic scanner for OBD-I (For example, Consult-I).
FAQ: answers to frequently asked questions about the Nissan Skyline R31
Is it possible to put the RB26DETT engine from the R32 GT-R in the R31?
Technically yes