Nissan Skyline R31 (1986): technical features, problems and why it became a legend

1986 was a landmark year for Nissan Skyline — it was then that the seventh generation of the model debuted under the index R31. This car occupied a unique place in the history of the Japanese automobile industry, becoming a bridge between the classic “boxes” of the 80s and the futuristic forms of the 90s. R31 is often underestimated compared to more famous ones R32 or R34, but it was this model that laid the foundation for future sports versions GT-R, having received a revolutionary all-wheel drive system at that time ATTESA and turbocharged series engines RB.

Unlike its predecessor R30, Skyline R31 received a completely new chassis, independent rear suspension and a body with improved aerodynamics. The car was offered in sedan, hardtop and even station wagon bodies, but its sports modifications brought it real fame - GTS-R with motor RB20DET-R and all-wheel drive transmission. Today R31 prized by collectors not only for its technical innovations, but also for its unique design, combining aggressive lines with 80s elegance.

Technical specifications Nissan Skyline R31 1986

Basic engine range Skyline R31 included naturally aspirated and turbocharged versions of the series RB, as well as diesel units LD20 for economical versions. Flagship modifications were equipped with an all-wheel drive system ATTESA E-TS (Advanced Total Traction Engineering System for All-Terrain), which later became a hallmark GT-R. Below are the key technical parameters:

Modification	Engine	Power (hp)	Drive	Gearbox
1800 GX	CA18i 1.8L I4	105	Rear	5-speed manual / 4-speed automatic transmission
2000 GTS	RB20E 2.0L I6	130	Rear	5-speed manual / 4-speed automatic transmission
2000 GTS-R	RB20DET-R 2.0L Turbo I6	210	Full (ATTESA)	5-speed manual
2800 GTS	RB28E 2.8L I6	150	Rear	5-speed manual / 4-speed automatic transmission

The system deserves special attention ATTESA, which is in R31 debuted in a simplified version - without electronic control of torque distribution (this appeared later in R32 GT-R). However, even this implementation provided excellent handling on slippery surfaces. Turbocharged RB20DET-R developed with intercooler 210 hp at 6400 rpm - a record figure for serial Japanese sedans of that time.

Design and body versions: from sedan to hardtop

Nissan Skyline R31 was offered in four main body modifications, each of which had unique features:

• 🚗 Sedan (4-door) - the most common version, often used in taxis and corporate parks. It featured a conservative design and a spacious interior.
• 🚘 Hardtop (2-door) — a sporty version with elongated doors and a more aggressive appearance. It was on the basis of the hardtop that racing versions were created.
• 🚙 Station wagon (Wagon) - a rare modification, produced under the name Skyline Crossover. It had increased ground clearance and all-wheel drive transmission.
• 🏎️ GTS-R (racing version) — limited edition with extended arches, spoiler and unique wheels. In total, about 800 copies were produced.

Design R31 developed Nissan Design International under the leadership Jerry Hirshberg, who later worked on Infiniti Q45. The car received characteristic “hidden” headlights (in some markets - ordinary block headlights), a trapezoidal radiator grille and expressive taillights. It's interesting that the body R31 20% stiffer than predecessor thanks to the use of high-strength steel in key areas.

⚠️ Attention: Upon purchase Skyline R31 pay attention to the condition of the rear arches and sills - these areas are most susceptible to corrosion due to the accumulation of dirt and poor anti-corrosion treatment at the factory.

Weaknesses and typical problems of R31

Despite its legendary status, Nissan Skyline R31 has a number of “diseases” that any potential owner should be aware of. Most of the problems are related to the age of the car and the specifics of Japanese engineering of the 80s.

• 🔧 RB series engines: Turbocharged versions (RB20DET) suffer from wear and tear on turbines (the lifespan of the original Garrett T25 - about 150 thousand km). There is also a common problem with oil leakage due to wear of the valve stem seals.
• ⚡ Electronics: Camshaft position sensors and automatic transmission control units often fail (Jatco 4N71B) and injection system relay. Electrical problems can manifest themselves in the form of “floating” speed or ignition failures.
• 🛠️ Suspension: Wheel bearings and silent blocks of levers require replacement every 50–60 thousand km. Rear shock absorbers often leak due to corrosion of the rods.
• 🔥 Transmission: In all-wheel drive versions, CV joints and differential wear out ATTESA. When slipping, the front axle coupling may burn out.

Particular attention should be paid to the cooling system: radiators R31 are prone to clogging, and thermostats often stick in the closed position, which leads to overheating. Antifreeze should be replaced every 2 years, regardless of mileage - original coolant Nissan Long Life Coolant loses properties over time.

Compression in the cylinders (the norm for RB20 is 12–13 bar)

Turbine condition (shaft play is not allowed)

Operation of the ATTESA system (tested on a lift)

Integrity of electrical wiring (especially in the engine compartment)

Traces of corrosion on the side members and arches -->

Tuning and modifications: how to unlock the potential of the R31

Skyline R31 - an ideal platform for tuning thanks to the simple and reliable chassis, as well as the potential of the engines RB. Most owners start with upgrading the power, but braking and suspension upgrades are just as important.

Basic directions of modifications:

• 💨 Power increase:
  • Replacing the turbine with Garrett T28 or T3/T4 (for RB20DET)
  • Installing a larger intercooler (for example, from R32 GT-R)
  • ECU chip tuning (popular firmware from Haltech or Nistune)
  • Replacing the fuel pump with Walbro 255 l/h for work with high pressure
• 🛑 Brakes: The standard brake calipers are weak on the high-performance versions. The solution is to install a kit from R32 GT-R (front 4-piston calipers + ventilated discs 300 mm).
• 🔄 Suspension: Popular spring/shock absorber kits Tein or BC Racing with adjustable hardness. For drifting, a rear differential is often installed Nismo LSD.

One of the most ambitious projects is an engine swap. For example, replacement RB20DET on RB26DETT from R32 GT-R requires modification of the mounts, but gives a power increase of up to 300+ hp. without serious tuning. Alternative - installation SR20DET (more resourceful, but less reliable at high power).

What are "Redtop" and "Blacktop" in the context of the R31?

The terms "Redtop" and "Blacktop" refer to engine valve covers RB and are more often associated with R32/R33, but in R31 "Redtop" prototype was installed - engine RB20DET with a red cap and more aggressive camshafts. These engines had increased valve lift (8.8 mm versus 8.6 mm in the standard version) and were distinguished by a more “angry” character at high speeds.

How much does a Nissan Skyline R31 cost today?

Prices for Nissan Skyline R31 vary greatly depending on condition, modification and market. In Japan, a car can be bought for 500–1500 thousand yen (≈3–10 thousand dollars), but export copies with history and low mileage are much more expensive.

Modification	Condition	Price (USD)	Market
GTS-R (ATTESA)	Excellent (restoration)	25 000–40 000	USA/Europe
2000 GTS (RB20E)	Good (drives, cosmetics)	8 000–15 000	Japan/New Zealand
1800 GX (CA18i)	Satisfactory (needs renovation)	3 000–6 000	Australia/SEA
Wagon (LD20)	Rare modification	12 000–20 000	Japan (domestic market)

The most expensive copies are GTS-R in original condition with documentation of race participation Group A. For example, in 2022 at auction Bring a Trailer such a car went for $47,000. Cheap offers (below $5,000) usually hide serious problems with the body or engine.

⚠️ Attention: When importing R31 from Japan, check compliance with your country's environmental regulations. Many turbocharged versions do not pass standards Euro-4 and higher without modifications.

Nissan Skyline R31 in motorsport: racing history

Skyline R31 left a noticeable mark on motorsport, especially in the championship Japanese Touring Car Championship (JTCC) And Group A. In 1987 the team Nissan Motorsport prepared a special racing version GTS-R with motor RB20DET-R, boosted to 300+ hp. The car competed in races with BMW M3 E30 And Ford Sierra RS500, demonstrating excellent handling on wet roads thanks to the system ATTESA.

One of the most famous episodes is related to the race 1988 Bathurst 1000, where R31 GTS-R manned Jim Richards And Mark Ska finished second, losing only Ford Sierra. This achievement proved the competitiveness of all-wheel drive in touring racing. Today the original racing R31 - a great rarity, but some examples have been restored by enthusiasts to participate in retro competitions.

How to operate the R31 in 2026: tips for owners

Operation Nissan Skyline R31 in modern conditions requires a special approach. Here are the key recommendations:

• 🛢️ Fuel: Use gasoline with an octane rating of at least 98. Turbocharged engines RB sensitive to detonation, and the modern "95" often does not meet Japanese standards of the 80s.
• 🔧 Service: Change the oil in the engine and gearbox every 5,000 km (even if the mileage is short). For RB20DET suitable oil 10W-40 or 15W-50 with permission API SG/SH.
• 🔋 Electrical: Install an additional fuse on the main power circuit - the original wiring is not designed for modern power-consuming devices (for example, LED headlights or powerful audio systems).
• 🚗 Winter operation: In all-wheel drive versions, check the system operation ATTESA in the snow - at low temperatures the oil in the transfer case may thicken.

When searching for spare parts, pay attention to the original catalog numbers. For example, for a turbine Garrett T25 analogue fits 700549-5, but it is better to take restored originals with balancing. For body parts, reproductions from Kamei or C-West, but high-quality original bumpers and fenders are almost impossible to find - they have to be restored.

FAQ: Frequently asked questions about Nissan Skyline R31

Is it possible to put the engine from the R32 GT-R (RB26DETT) in the R31?

Yes, but significant improvements will be required:

• Replacing engine mounts (pan R31 not compatible with RB26)
• Modification of the exhaust system and turbines (in R31 less space in the engine compartment)
• Adaptation of electronics (you need a standalone control unit, for example, Haltech Elite)
• Strengthening the transmission (box R31 not designed for 500+ hp)

Alternative - swap RB25DET (from R33), which installs with minimal modifications.

What kind of oil to pour into the RB20DET engine?

Recommended options:

• Mineral: Nissan Motor Oil 15W-40 (original if the engine is not tuned)
• Semi-synthetic: Liqui Moly 10W-40 Leichtlauf (good price/quality balance)
• Synthetic: Motul 300V 15W-50 (for forced engines with a turbine)

Important: Avoid oils with energy-saving additives (e.g. 0W-20) - they are not suitable for older engines with large clearances.

How to distinguish an original GTS-R from a replica?

Signs of the original GTS-R:

• Availability of nameplate GTS-R on the back door (often absent on replicas)
• Unique VIN starting with BNR31 (for regular versions - HR31 or ER31)
• Original wheels Speedline size 15×7J with inscription Nissan Motorsport
• Red seat belts and unique interior trim (black Alcantara + red inserts)
• Availability of intercooler with logo Nismo (on replicas there is often a universal one)

Check the car's history through Japanese auction houses (USS or TCV) - original GTS-R have documents on participation in races.

How much does Skyline R31 weigh?

Weight depends on modification:

• 1800 GX Sedan: 1,180–1,220 kg
• Hardtop 2000 GTS: 1,250–1,300 kg
• GTS-R (ATTESA): 1,380–1,420 kg
• Wagon (LD20): 1,350–1,400 kg

All-wheel drive versions are 100–150 kg heavier due to the transmission. For comparison, R32 GT-R weighs about 1,430 kg.

What analogues of the R31 did competitors have?

Late 80s Skyline R31 competed with:

• Toyota Chaser (X60) - rear-wheel drive sedan with engines 1G-GZE (boost) and 1JZ-GE (atmospheric). Less sporty, but more reliable.
• Mazda Luce (HG) - all-wheel drive version with motor 13B-REW (rotary). A rarity, but a very interesting alternative.
• Mitsubishi Starion - coupe with turbo engine 4G63T and all-wheel drive. More aggressive design, but less practical.
• Honda Legend (KA) — luxury sedan with V6 C27A. More comfortable, but weaker in dynamics.

Main advantage R31 - a balance between sporting qualities and everyday practicality.