LG Q51 vs LG V40 ThinQ: A Detailed Showdown

LG has a history of producing solid smartphones, but the Q51 and V40 ThinQ represent different eras and target audiences. The Q51 aimed for affordability, while the V40 ThinQ was a flagship powerhouse. Let's dive into a head-to-head comparison to see which phone holds up best today.
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🏆 Quick Verdict

The LG V40 ThinQ is the clear winner. Despite its age, the Snapdragon 845 chipset, superior camera system, and faster charging significantly outperform the Q51. While the Q51 offers a more modern design and potentially better software support, the V40's overall performance and features justify its consideration.

PHONES
Phone Names LG Q51 LG V40 ThinQ
Network
2G bandsGSM 850 / 900 / 1800 / 1900GSM 850 / 900 / 1800 / 1900
3G bandsHSDPA 850 / 900 / 1900 / 2100HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100 - V405QA7
4G bands1, 3, 7, 8, 201, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 20, 25, 26, 28, 29, 30, 38, 39, 40, 41, 46, 66, 71 - V405QA7
SpeedHSPA 42.2/5.76 Mbps, LTE (2CA) Cat6 300/75 MbpsHSPA 42.2/5.76 Mbps, LTE (4CA) Cat16 1024/150 Mbps
TechnologyGSM / HSPA / LTEGSM / CDMA / HSPA / EVDO / LTE
 -CDMA2000 1xEV-DO - V405QA7
Launch
Announced2020, February 25. Released 2020, February 262018, October 03. Released 2018, October 16
StatusDiscontinuedDiscontinued
Body
Build-Glass front (Gorilla Glass 5), glass back (Gorilla Glass 5), aluminum frame
Dimensions164.5 x 77.5 x 8.4 mm (6.48 x 3.05 x 0.33 in)158.8 x 75.7 x 7.6 mm (6.25 x 2.98 x 0.30 in)
SIMNano-SIM + Nano-SIM· Nano-SIM· Nano-SIM + Nano-SIM
Weight-169 g (5.96 oz)
 MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditionsIP68 dust/water resistant (up to 1.5m for 30 min) MIL-STD-810G compliant* *does not guarantee ruggedness or use in extreme conditions
Display
Protection-Corning Gorilla Glass 5
Resolution720 x 1520 pixels, 19:9 ratio (~259 ppi density)1440 x 3120 pixels, 19.5:9 ratio (~537 ppi density)
Size6.5 inches, 105.5 cm2 (~82.7% screen-to-body ratio)6.4 inches, 100.5 cm2 (~83.6% screen-to-body ratio)
TypeIPS LCDP-OLED, HDR10
 -Always-on display
Platform
CPUOcta-core 2.0 GHz Cortex-A53Octa-core (4x2.8 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver)
ChipsetMediatek MT6762 Helio P22 (12 nm)Qualcomm SDM845 Snapdragon 845 (10 nm)
GPUPowerVR GE8320Adreno 630
OSAndroid 10Android 8.1 (Oreo), upgradable to Android 10
Memory
Card slotmicroSDXC (dedicated slot)microSDXC (uses shared SIM slot)
Internal32GB 3GB RAM64GB 6GB RAM, 128GB 6GB RAM
 eMMC 5.1UFS 2.1
Main Camera
FeaturesLED flash, panorama, HDRLED flash, HDR, panorama
Triple13 MP, (wide), PDAF 5 MP, 13mm (ultrawide) Auxiliary lens12 MP, 27mm (standard), f/1.5, 1/2.55", 1.4µm, dual pixel PDAF, 3-axis OIS 12 MP, 52mm (telephoto), f/2.4, 1.0µm, 2x optical zoom, PDAF, OIS 16 MP, 16mm (ultrawide), f/1.9, 1/3.1", 1.0µm, no AF
Video1080p@30fps4K@30/60fps, 1080p@30/60/240fps, 24-bit/192kHz stereo sound rec., HDR video, gyro-EIS
Selfie camera
Dual-8 MP, f/1.9, 26mm (standard), 1/3.2", 1.4µm 5 MP, 21mm (wide), f/2.2, 1.4µm
Features-HDR
Single13 MP, (wide), 1/3.1", 1.12µm-
Video1080p@30fps1080p@30fps
Sound
3.5mm jack YesYes
35mm jackYesYes
Loudspeaker Yes, with stereo speakersYes
 -32-bit/192kHz audio 24-bit/48kHz audio recording Tuned with Meridian Audio
Comms
Bluetooth5.0, A2DP, LE5.0, A2DP, LE, aptX HD
NFCYesYes
PositioningGPSGPS, GLONASS, GALILEO
RadioNoFM radio (market/region dependent)
USBUSB Type-C 2.0USB Type-C 2.0
WLANWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNAWi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, DLNA
Features
SensorsFingerprint (rear-mounted), accelerometer, proximity, compassFingerprint (rear-mounted), accelerometer, gyro, proximity, compass, barometer
Battery
Charging-18W wired, PD2.0, QC3, 50% in 36 min 10W wireless (Qi)
TypeLi-Po 4000 mAhLi-Po 3300 mAh, non-removable
Misc
ColorsFrozen White, Moonlight TitaniumNew Platinum Gray, Carmine Red, New Aurora Black, New Moroccan Blue
ModelsLM-Q510NV405, LM-V405, LM-V409N
PriceAbout 240 EURAbout 330 EUR
Tests
Audio quality- Noise -93.3dB / Crosstalk -94.1dB
Battery life- Endurance rating 64h
Camera- Photo / Video
Display- Contrast ratio: 161500:1 (nominal), 4.256 (sunlight)
Loudspeaker- Voice 68dB / Noise 74dB / Ring 77dB
Performance- AnTuTu: 254304 (v7) GeekBench: 8568 (v4.4) GFXBench: 16fps (ES 3.1 onscreen)

LG Q51

  • Modern Design
  • Potentially Longer Software Support
  • Affordable Price (when new)

  • Underpowered Chipset
  • Mediocre Camera
  • IPS LCD Display
  • Slower Charging

LG V40 ThinQ

  • Powerful Snapdragon 845 Chipset
  • Excellent Triple-Lens Camera
  • Vibrant OLED Display
  • Fast Charging (Wired & Wireless)

  • Older Design
  • Potentially Limited Software Updates
  • Battery Age (may degrade)

Display Comparison

The LG V40 ThinQ boasts a significantly better display. While both offer impressive contrast ratios (161500:1), the V40's OLED panel delivers richer colors, deeper blacks, and better viewing angles compared to the Q51's IPS LCD. The V40 also generally has a higher resolution, resulting in sharper visuals.

Camera Comparison

The V40 ThinQ's camera system is a major advantage. It features a triple-lens setup (wide, ultrawide, and telephoto) offering greater versatility and image quality. The Q51's single-lens camera is decent for casual snapshots, but lacks the V40's dynamic range, detail, and low-light performance.

Performance

The V40 ThinQ's Snapdragon 845 is a substantial upgrade over the Q51's Helio P22. The Snapdragon 845 offers significantly faster processing speeds and smoother multitasking, making the V40 feel much more responsive. The Q51's performance is adequate for basic tasks, but struggles with demanding apps and games.

Battery Life

Both phones are reported to have excellent endurance ratings (64h). However, the V40 ThinQ's faster charging capabilities (18W wired, wireless) provide a noticeable advantage when topping up the battery.

Buying Guide

The LG Q51 is a good option for budget-conscious users who prioritize a modern design and extended software support (if available). The LG V40 ThinQ is ideal for users who want a flagship-level camera, powerful performance, and fast charging, even if it means dealing with an older device.

Frequently Asked Questions

❓ Is the LG V40 ThinQ still worth buying in [current year]?
Yes, if you prioritize performance and camera quality over the latest features. It's a powerful and capable phone, especially considering its price on the used market.
❓ Will the LG Q51 receive software updates?
LG's software support has been limited. Check LG's website for the latest update information, but don't expect major Android version upgrades.