TDV6 / SDV6 vs 1.9 D / dTi: which engine is more reliable?

According to our risk index, the TDV6 / SDV6 carries less risk than the 1.9 D / dTi: 46/100 (moderate risk) versus 52/100 (high risk). The TDV6 / SDV6 has 2 documented serious faults, the main one being «Crankshaft breakage and spinning main bearing shells»; the 1.9 D / dTi has 3 documented serious faults, the main one being «Damaged cylinder head and head gasket (naturally aspirated 1.9 D)».

Risk index

TDV6 / SDV6

Moderate risk · 2 serious faults

Lower risk

Risk index

1.9 D / dTi

High risk · 3 serious faults

The index (0–100) weights the severity and frequency of the three most serious documented faults. How it is calculated

Reviewed on 2 November 202614 sources How we work

Is the TDV6 / SDV6 reliable?

The Land Rover and Jaguar TDV6/SDV6 diesel V6 engines, shared with Peugeot and Citroën, have a serious documented fault: crankshaft and main bearing shells on the 3.0, and the belt-driven oil pump on the 2.7. Insist on a service history and weigh up the repair cost before buying.^[1][2][3]

See the 3 of the TDV6 / SDV6 faults

Is the 1.9 D / dTi reliable?

Renault's 1.9 D, 1.9 TD and 1.9 dTi diesels (F8Q, F8Qt and F9Q with an injection pump) have a reputation for longevity, but owner reviews repeat three weak points: the injection pump and cylinder head gasket on the naturally aspirated 1.9 D, and the auxiliary belt, EGR and turbo on the dTi. The common-rail 1.9 dCi is a different engine.^[4][5][6][7]

See the 7 of the 1.9 D / dTi faults

Side-by-side comparison

Comparison of TDV6 / SDV6 and 1.9 D / dTi
Item	TDV6 / SDV6	1.9 D / dTi
Technical data
Type	Engine	Engine
Fuel	Diesel	Diesel
Displacement	2,720 cm³	1,870 cm³
Timing	Wet belt (belt-in-oil)	Timing belt (dry)
Power	188–302 hp	55–100 hp
Production	2004–2018^[8]	1988–2006^[4][9][10]
Reliability
Risk index (what is it?)	46Moderate risk	52High risk
Documented faults	3	7
Of high or critical severity	2	3
Worst severity	Critical severity	Critical severity
Main faults	Critical severity: Crankshaft breakage and spinning main bearing shells Critical severity: Broken oil pump housing and timing belt jumping on the 2.7 Medium severity: Turbo and pneumatic actuator failure on the 3.0 TDV6/SDV6	High severity: Damaged cylinder head and head gasket (naturally aspirated 1.9 D) Critical severity: Brake servo vacuum pump: oil suction and loss of assistance High severity: Auxiliary and timing belt: breakage that can destroy the engine
Most expensive documented repair	No reliable data	No reliable data
Which versions to buy
BuyRecommended versions	None	None
With cautionVersions to be cautious about	2.7 TDV6 (276DT/DT17, 2004-2010)^[3][11] 3.0 TDV6/SDV6 (306DT, 2009-2018)^[1][2]	1.9 D 55/65 hp (F8Q, naturally aspirated indirect injection, 1988-2006)^{[5][6][7][12]} 1.9 TD/dT 90-95 hp (F8Qt, turbo with indirect injection, 1991-2001)^[4][7] 1.9 dTi 80-100 hp (F9Q with mechanical pump, direct injection and turbo, 1997-2002)^{[7][12][13][14]}
AvoidVersions to avoid	None	None

Severity of each fault: green, low; amber, medium; red, high; dark red, critical. How we rate them

Cars that each one is fitted to

TDV6 / SDV6

See the 15 models with the TDV6 / SDV6

1.9 D / dTi

See the 11 models with the 1.9 D / dTi

Other comparisons

With the TDV6 / SDV6

With the 1.9 D / dTi

Compare other engines

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Sources

Every fact on this page links to its source. If you find an error, let us know.

Land Rover Discovery TDV6 engine failures making headlinesLandyOnline · Other source · published October 2015 · consulted 5 October 2026
Land Rover & Jaguar SDV6/TDV6 Crankshaft RepairJLR Engines · Technical documentation · consulted 5 October 2026
Land Rover 2.7 TDV6 Timing Belt Replacement GuideBudget Parts (roverparts.eu) · Technical documentation · consulted 5 October 2026
Moteur F (Renault)Wikipédia (francés) · Other source · consulted 2 November 2026 · in French
Renault Clio IIWikipédia (francés) · Other source · consulted 2 November 2026 · in French
Fiabilité Renault Clio 2 : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Mégane 1 (1995-2002) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Ford AJD-V6/PSA DT17 engineWikipedia · Other source · consulted 5 October 2026
Renault F-Type engineWikipedia (inglés) · Other source · consulted 2 November 2026
Renault Clio IIWikipedia (alemán) · Other source · consulted 2 November 2026 · in German
TdV6 Timing BeltLes Richmond Automotive (lrautomotive.com.au) · Technical documentation · consulted 5 October 2026
Fiabilité Renault Kangoo (1997-2007) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Scénic 1 (1996-2003) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French
Fiabilité Renault Laguna 1 (1994-2001) : pannes et avis des propriétairesFiches-auto.fr · Motoring press · consulted 2 November 2026 · in French